diff --git a/.gitignore b/.gitignore
index 2a9b230..170b7ec 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,3 @@
-_build
+build
 .idea
 make_all_sync
diff --git a/Makefile b/Makefile
index d4bb2cb..d0c3cbf 100644
--- a/Makefile
+++ b/Makefile
@@ -5,8 +5,8 @@
 # from the environment for the first two.
 SPHINXOPTS    ?=
 SPHINXBUILD   ?= sphinx-build
-SOURCEDIR     = .
-BUILDDIR      = _build
+SOURCEDIR     = source
+BUILDDIR      = build
 
 # Put it first so that "make" without argument is like "make help".
 help:
diff --git a/make.bat b/make.bat
index 2119f51..9534b01 100644
--- a/make.bat
+++ b/make.bat
@@ -1,35 +1,35 @@
-@ECHO OFF
-
-pushd %~dp0
-
-REM Command file for Sphinx documentation
-
-if "%SPHINXBUILD%" == "" (
-	set SPHINXBUILD=sphinx-build
-)
-set SOURCEDIR=.
-set BUILDDIR=_build
-
-if "%1" == "" goto help
-
-%SPHINXBUILD% >NUL 2>NUL
-if errorlevel 9009 (
-	echo.
-	echo.The 'sphinx-build' command was not found. Make sure you have Sphinx
-	echo.installed, then set the SPHINXBUILD environment variable to point
-	echo.to the full path of the 'sphinx-build' executable. Alternatively you
-	echo.may add the Sphinx directory to PATH.
-	echo.
-	echo.If you don't have Sphinx installed, grab it from
-	echo.http://sphinx-doc.org/
-	exit /b 1
-)
-
-%SPHINXBUILD% -M %1 %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
-goto end
-
-:help
-%SPHINXBUILD% -M help %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
-
-:end
-popd
+@ECHO OFF
+
+pushd %~dp0
+
+REM Command file for Sphinx documentation
+
+if "%SPHINXBUILD%" == "" (
+	set SPHINXBUILD=sphinx-build
+)
+set SOURCEDIR=source
+set BUILDDIR=build
+
+if "%1" == "" goto help
+
+%SPHINXBUILD% >NUL 2>NUL
+if errorlevel 9009 (
+	echo.
+	echo.The 'sphinx-build' command was not found. Make sure you have Sphinx
+	echo.installed, then set the SPHINXBUILD environment variable to point
+	echo.to the full path of the 'sphinx-build' executable. Alternatively you
+	echo.may add the Sphinx directory to PATH.
+	echo.
+	echo.If you don't have Sphinx installed, grab it from
+	echo.http://sphinx-doc.org/
+	exit /b 1
+)
+
+%SPHINXBUILD% -M %1 %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
+goto end
+
+:help
+%SPHINXBUILD% -M help %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
+
+:end
+popd
diff --git a/01-intro.rst b/source/01-intro.rst
similarity index 100%
rename from 01-intro.rst
rename to source/01-intro.rst
diff --git a/02-enter.rst b/source/02-enter.rst
similarity index 100%
rename from 02-enter.rst
rename to source/02-enter.rst
diff --git a/03-01-new.rst b/source/03-01-new.rst
similarity index 100%
rename from 03-01-new.rst
rename to source/03-01-new.rst
diff --git a/03-02-01-edit-group.rst b/source/03-02-01-edit-group.rst
similarity index 100%
rename from 03-02-01-edit-group.rst
rename to source/03-02-01-edit-group.rst
diff --git a/03-02-02-del-question.rst b/source/03-02-02-del-question.rst
similarity index 100%
rename from 03-02-02-del-question.rst
rename to source/03-02-02-del-question.rst
diff --git a/03-02-03-gender.rst b/source/03-02-03-gender.rst
similarity index 100%
rename from 03-02-03-gender.rst
rename to source/03-02-03-gender.rst
diff --git a/03-02-04-date.rst b/source/03-02-04-date.rst
similarity index 100%
rename from 03-02-04-date.rst
rename to source/03-02-04-date.rst
diff --git a/03-02-05-single.rst b/source/03-02-05-single.rst
similarity index 100%
rename from 03-02-05-single.rst
rename to source/03-02-05-single.rst
diff --git a/03-02-06-sort.rst b/source/03-02-06-sort.rst
similarity index 100%
rename from 03-02-06-sort.rst
rename to source/03-02-06-sort.rst
diff --git a/03-02-07-preview.rst b/source/03-02-07-preview.rst
similarity index 100%
rename from 03-02-07-preview.rst
rename to source/03-02-07-preview.rst
diff --git a/03-02-08-review.rst b/source/03-02-08-review.rst
similarity index 100%
rename from 03-02-08-review.rst
rename to source/03-02-08-review.rst
diff --git a/03-02-basic.rst b/source/03-02-basic.rst
similarity index 100%
rename from 03-02-basic.rst
rename to source/03-02-basic.rst
diff --git a/03-03-01-number.rst b/source/03-03-01-number.rst
similarity index 100%
rename from 03-03-01-number.rst
rename to source/03-03-01-number.rst
diff --git a/03-03-02-multi-numbers.rst b/source/03-03-02-multi-numbers.rst
similarity index 100%
rename from 03-03-02-multi-numbers.rst
rename to source/03-03-02-multi-numbers.rst
diff --git a/03-03-03-likert.rst b/source/03-03-03-likert.rst
similarity index 100%
rename from 03-03-03-likert.rst
rename to source/03-03-03-likert.rst
diff --git a/03-03-04-order.rst b/source/03-03-04-order.rst
similarity index 100%
rename from 03-03-04-order.rst
rename to source/03-03-04-order.rst
diff --git a/03-03-05-review.rst b/source/03-03-05-review.rst
similarity index 100%
rename from 03-03-05-review.rst
rename to source/03-03-05-review.rst
diff --git a/03-03-question-types.rst b/source/03-03-question-types.rst
similarity index 100%
rename from 03-03-question-types.rst
rename to source/03-03-question-types.rst
diff --git a/03-04-01-yesno.rst b/source/03-04-01-yesno.rst
similarity index 100%
rename from 03-04-01-yesno.rst
rename to source/03-04-01-yesno.rst
diff --git a/03-04-02-id.rst b/source/03-04-02-id.rst
similarity index 100%
rename from 03-04-02-id.rst
rename to source/03-04-02-id.rst
diff --git a/03-04-03-contact.rst b/source/03-04-03-contact.rst
similarity index 100%
rename from 03-04-03-contact.rst
rename to source/03-04-03-contact.rst
diff --git a/03-04-04-comment.rst b/source/03-04-04-comment.rst
similarity index 100%
rename from 03-04-04-comment.rst
rename to source/03-04-04-comment.rst
diff --git a/03-04-05-preview.rst b/source/03-04-05-preview.rst
similarity index 100%
rename from 03-04-05-preview.rst
rename to source/03-04-05-preview.rst
diff --git a/03-04-06-review.rst b/source/03-04-06-review.rst
similarity index 100%
rename from 03-04-06-review.rst
rename to source/03-04-06-review.rst
diff --git a/03-04-logic.rst b/source/03-04-logic.rst
similarity index 100%
rename from 03-04-logic.rst
rename to source/03-04-logic.rst
diff --git a/03-create.rst b/source/03-create.rst
similarity index 100%
rename from 03-create.rst
rename to source/03-create.rst
diff --git a/04-01-activate.rst b/source/04-01-activate.rst
similarity index 100%
rename from 04-01-activate.rst
rename to source/04-01-activate.rst
diff --git a/04-02-open.rst b/source/04-02-open.rst
similarity index 100%
rename from 04-02-open.rst
rename to source/04-02-open.rst
diff --git a/04-03-01-participants.rst b/source/04-03-01-participants.rst
similarity index 100%
rename from 04-03-01-participants.rst
rename to source/04-03-01-participants.rst
diff --git a/04-03-02-messages.rst b/source/04-03-02-messages.rst
similarity index 100%
rename from 04-03-02-messages.rst
rename to source/04-03-02-messages.rst
diff --git a/04-03-closed.rst b/source/04-03-closed.rst
similarity index 100%
rename from 04-03-closed.rst
rename to source/04-03-closed.rst
diff --git a/04-04-stop.rst b/source/04-04-stop.rst
similarity index 100%
rename from 04-04-stop.rst
rename to source/04-04-stop.rst
diff --git a/04-05-review.rst b/source/04-05-review.rst
similarity index 100%
rename from 04-05-review.rst
rename to source/04-05-review.rst
diff --git a/04-run.rst b/source/04-run.rst
similarity index 100%
rename from 04-run.rst
rename to source/04-run.rst
diff --git a/05-01-01-simple.rst b/source/05-01-01-simple.rst
similarity index 100%
rename from 05-01-01-simple.rst
rename to source/05-01-01-simple.rst
diff --git a/05-01-02-full.rst b/source/05-01-02-full.rst
similarity index 100%
rename from 05-01-02-full.rst
rename to source/05-01-02-full.rst
diff --git a/05-01-stats.rst b/source/05-01-stats.rst
similarity index 100%
rename from 05-01-stats.rst
rename to source/05-01-stats.rst
diff --git a/05-02-export.rst b/source/05-02-export.rst
similarity index 100%
rename from 05-02-export.rst
rename to source/05-02-export.rst
diff --git a/05-03-review.rst b/source/05-03-review.rst
similarity index 100%
rename from 05-03-review.rst
rename to source/05-03-review.rst
diff --git a/05-result.rst b/source/05-result.rst
similarity index 100%
rename from 05-result.rst
rename to source/05-result.rst
diff --git a/apx-01-copy.rst b/source/apx-01-copy.rst
similarity index 100%
rename from apx-01-copy.rst
rename to source/apx-01-copy.rst
diff --git a/apx-02-ab-testing.rst b/source/apx-02-ab-testing.rst
similarity index 100%
rename from apx-02-ab-testing.rst
rename to source/apx-02-ab-testing.rst
diff --git a/conf.py b/source/conf.py
similarity index 98%
rename from conf.py
rename to source/conf.py
index c51e5f8..75e2081 100644
--- a/conf.py
+++ b/source/conf.py
@@ -46,7 +46,7 @@ language = 'zh_TW'
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
 # This pattern also affects html_static_path and html_extra_path.
-exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
+exclude_patterns = []
 
 
 # -- Options for HTML output -------------------------------------------------
diff --git a/images/02-admin.png b/source/images/02-admin.png
similarity index 100%
rename from images/02-admin.png
rename to source/images/02-admin.png
diff --git a/images/02-login.png b/source/images/02-login.png
similarity index 100%
rename from images/02-login.png
rename to source/images/02-login.png
diff --git a/images/02-surveys.png b/source/images/02-surveys.png
similarity index 100%
rename from images/02-surveys.png
rename to source/images/02-surveys.png
diff --git a/images/03-01-new-survey-done.png b/source/images/03-01-new-survey-done.png
similarity index 100%
rename from images/03-01-new-survey-done.png
rename to source/images/03-01-new-survey-done.png
diff --git a/images/03-01-new-survey-preview.png b/source/images/03-01-new-survey-preview.png
similarity index 100%
rename from images/03-01-new-survey-preview.png
rename to source/images/03-01-new-survey-preview.png
diff --git a/images/03-01-new-survey.png b/source/images/03-01-new-survey.png
similarity index 100%
rename from images/03-01-new-survey.png
rename to source/images/03-01-new-survey.png
diff --git a/images/03-02-01-edit-group-01.png b/source/images/03-02-01-edit-group-01.png
similarity index 100%
rename from images/03-02-01-edit-group-01.png
rename to source/images/03-02-01-edit-group-01.png
diff --git a/images/03-02-01-edit-group-02.png b/source/images/03-02-01-edit-group-02.png
similarity index 100%
rename from images/03-02-01-edit-group-02.png
rename to source/images/03-02-01-edit-group-02.png
diff --git a/images/03-02-01-edit-group-03.png b/source/images/03-02-01-edit-group-03.png
similarity index 100%
rename from images/03-02-01-edit-group-03.png
rename to source/images/03-02-01-edit-group-03.png
diff --git a/images/03-02-02-del-question-01.png b/source/images/03-02-02-del-question-01.png
similarity index 100%
rename from images/03-02-02-del-question-01.png
rename to source/images/03-02-02-del-question-01.png
diff --git a/images/03-02-02-del-question-02.png b/source/images/03-02-02-del-question-02.png
similarity index 100%
rename from images/03-02-02-del-question-02.png
rename to source/images/03-02-02-del-question-02.png
diff --git a/images/03-02-02-del-question-03.png b/source/images/03-02-02-del-question-03.png
similarity index 100%
rename from images/03-02-02-del-question-03.png
rename to source/images/03-02-02-del-question-03.png
diff --git a/images/03-02-03-gender-01.png b/source/images/03-02-03-gender-01.png
similarity index 100%
rename from images/03-02-03-gender-01.png
rename to source/images/03-02-03-gender-01.png
diff --git a/images/03-02-03-gender-02-01.png b/source/images/03-02-03-gender-02-01.png
similarity index 100%
rename from images/03-02-03-gender-02-01.png
rename to source/images/03-02-03-gender-02-01.png
diff --git a/images/03-02-03-gender-02-02.png b/source/images/03-02-03-gender-02-02.png
similarity index 100%
rename from images/03-02-03-gender-02-02.png
rename to source/images/03-02-03-gender-02-02.png
diff --git a/images/03-02-03-gender-02-03-01.png b/source/images/03-02-03-gender-02-03-01.png
similarity index 100%
rename from images/03-02-03-gender-02-03-01.png
rename to source/images/03-02-03-gender-02-03-01.png
diff --git a/images/03-02-03-gender-02-03-02.png b/source/images/03-02-03-gender-02-03-02.png
similarity index 100%
rename from images/03-02-03-gender-02-03-02.png
rename to source/images/03-02-03-gender-02-03-02.png
diff --git a/images/03-02-03-gender-02-03-03.png b/source/images/03-02-03-gender-02-03-03.png
similarity index 100%
rename from images/03-02-03-gender-02-03-03.png
rename to source/images/03-02-03-gender-02-03-03.png
diff --git a/images/03-02-03-gender-02-03-04.png b/source/images/03-02-03-gender-02-03-04.png
similarity index 100%
rename from images/03-02-03-gender-02-03-04.png
rename to source/images/03-02-03-gender-02-03-04.png
diff --git a/images/03-02-03-gender-02-03.png b/source/images/03-02-03-gender-02-03.png
similarity index 100%
rename from images/03-02-03-gender-02-03.png
rename to source/images/03-02-03-gender-02-03.png
diff --git a/images/03-02-03-gender-02.png b/source/images/03-02-03-gender-02.png
similarity index 100%
rename from images/03-02-03-gender-02.png
rename to source/images/03-02-03-gender-02.png
diff --git a/images/03-02-03-gender-03.png b/source/images/03-02-03-gender-03.png
similarity index 100%
rename from images/03-02-03-gender-03.png
rename to source/images/03-02-03-gender-03.png
diff --git a/images/03-02-03-gender-04.png b/source/images/03-02-03-gender-04.png
similarity index 100%
rename from images/03-02-03-gender-04.png
rename to source/images/03-02-03-gender-04.png
diff --git a/images/03-02-04-date-01.png b/source/images/03-02-04-date-01.png
similarity index 100%
rename from images/03-02-04-date-01.png
rename to source/images/03-02-04-date-01.png
diff --git a/images/03-02-04-date-02.png b/source/images/03-02-04-date-02.png
similarity index 100%
rename from images/03-02-04-date-02.png
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diff --git a/images/03-02-04-date-03.png b/source/images/03-02-04-date-03.png
similarity index 100%
rename from images/03-02-04-date-03.png
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diff --git a/images/03-02-05-single-01.png b/source/images/03-02-05-single-01.png
similarity index 100%
rename from images/03-02-05-single-01.png
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diff --git a/images/03-02-05-single-02.png b/source/images/03-02-05-single-02.png
similarity index 100%
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diff --git a/images/03-02-05-single-03-01.png b/source/images/03-02-05-single-03-01.png
similarity index 100%
rename from images/03-02-05-single-03-01.png
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similarity index 100%
rename from images/03-02-05-single-03-02.png
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diff --git a/images/03-02-05-single-03-03.png b/source/images/03-02-05-single-03-03.png
similarity index 100%
rename from images/03-02-05-single-03-03.png
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diff --git a/images/03-02-05-single-03-04.png b/source/images/03-02-05-single-03-04.png
similarity index 100%
rename from images/03-02-05-single-03-04.png
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diff --git a/images/03-02-05-single-03-05.png b/source/images/03-02-05-single-03-05.png
similarity index 100%
rename from images/03-02-05-single-03-05.png
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diff --git a/images/03-02-05-single-04-01.png b/source/images/03-02-05-single-04-01.png
similarity index 100%
rename from images/03-02-05-single-04-01.png
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diff --git a/images/03-02-05-single-04-02.png b/source/images/03-02-05-single-04-02.png
similarity index 100%
rename from images/03-02-05-single-04-02.png
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diff --git a/images/03-02-05-single-05.png b/source/images/03-02-05-single-05.png
similarity index 100%
rename from images/03-02-05-single-05.png
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diff --git a/images/03-02-06-sort-01.png b/source/images/03-02-06-sort-01.png
similarity index 100%
rename from images/03-02-06-sort-01.png
rename to source/images/03-02-06-sort-01.png
diff --git a/images/03-02-06-sort-02.png b/source/images/03-02-06-sort-02.png
similarity index 100%
rename from images/03-02-06-sort-02.png
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diff --git a/images/03-02-06-sort-03.png b/source/images/03-02-06-sort-03.png
similarity index 100%
rename from images/03-02-06-sort-03.png
rename to source/images/03-02-06-sort-03.png
diff --git a/images/03-02-07-preview-01.png b/source/images/03-02-07-preview-01.png
similarity index 100%
rename from images/03-02-07-preview-01.png
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diff --git a/images/03-02-07-preview-02.png b/source/images/03-02-07-preview-02.png
similarity index 100%
rename from images/03-02-07-preview-02.png
rename to source/images/03-02-07-preview-02.png
diff --git a/images/03-02-07-preview-03.png b/source/images/03-02-07-preview-03.png
similarity index 100%
rename from images/03-02-07-preview-03.png
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diff --git a/images/03-02-07-preview-04.png b/source/images/03-02-07-preview-04.png
similarity index 100%
rename from images/03-02-07-preview-04.png
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diff --git a/images/03-02-07-preview-05.png b/source/images/03-02-07-preview-05.png
similarity index 100%
rename from images/03-02-07-preview-05.png
rename to source/images/03-02-07-preview-05.png
diff --git a/images/03-03-01-number-01.png b/source/images/03-03-01-number-01.png
similarity index 100%
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diff --git a/images/03-03-01-number-02.png b/source/images/03-03-01-number-02.png
similarity index 100%
rename from images/03-03-01-number-02.png
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diff --git a/images/03-03-01-number-03.png b/source/images/03-03-01-number-03.png
similarity index 100%
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diff --git a/images/03-03-01-number-04.png b/source/images/03-03-01-number-04.png
similarity index 100%
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diff --git a/images/03-03-01-number-05.png b/source/images/03-03-01-number-05.png
similarity index 100%
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diff --git a/images/03-03-02-multi-numbers-01.png b/source/images/03-03-02-multi-numbers-01.png
similarity index 100%
rename from images/03-03-02-multi-numbers-01.png
rename to source/images/03-03-02-multi-numbers-01.png
diff --git a/images/03-03-02-multi-numbers-02.png b/source/images/03-03-02-multi-numbers-02.png
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