Prepared to merge the Deutsch localization.

Revert "Updated the copyright year."

This reverts commit 4664f6e90e.

oxt/pkg-desc/pkg-description.txt

@@ -1,4 +1,4 @@
 PokemonGoIV - Pokémon GO IV Calculator
-Copyright (c) 2016-2017 imacat 
+Copyright (c) 2016 imacat 
 
 Calculates the individual values (IVs) of the Pokémon.

oxt/pkg-desc/pkg-description.zh-TW.txt

@@ -1,4 +1,4 @@
 PokemonGoIV - 寶可夢 GO IV 計算機
-版權所有 (c) 2016-2017 依瑪貓
+版權所有 (c) 2016 依瑪貓
 
 計算寶可夢的 IV 值。