version 1.7.8
* combine English/Punctuation modes into one mode.

version 1.7.7
* bug fixes.
* update translations.

version 1.7.4
* add option - "Use Space Key to Show Candidates".
* add option - "Show Candidates After the Cursor".
* use zhuyin_valid_zhuyin_keys method.

version 1.7.1
* migrate setup dialog to python 3.x.
* support gnome-software.

version 1.7.0
* the first release of 1.7.x series.