po: add zh_TW translation

zh_TW translation of app and glossary based-on existing zh_CN
translation.  Few strings that I'm not
familiar with is left untranslated.

Signed-off-by: Ｖ字龍(Vdragon) <pika1021@gmail.com>
hotkeys_zh_TW: add & update translation to make it coherent with app UI

Signed-off-by: Ｖ字龍(Vdragon) <pika1021@gmail.com>
Merge pull request #272 from Vdragon/translation_zh_TW

Add zh_TW translation

Signed-off-by: David Aguilar <davvid@gmail.com>