dont freeze UI when mass-marking unread
Remove trailing semicolon in __init__.py
Change interface language without restart
Add Czech translation
Merge pull request #751 from Atheros1/master

New depends module to check dependencies. Moved version check to new depends module.
Merge pull request #752 from Atheros1/master

Backup keys.dat before writing
Merge pull request #731 from fanquake/remove_semicolon

Remove trailing semicolon in __init__.py
Merge pull request #735 from themighty1/ui-freeze-fix

dont freeze UI when mass-marking unread
Merge pull request #736 from digital-dreamer/translate-without-restart

Change interface language without restart
Merge branch 'czech' of https://github.com/digital-dreamer/PyBitmessage into digital-dreamer-czech
updated settings.ui file for Czech translation