Merge branch 'install_issues'

 to explain why this merge is necessary,
Merge branch 'tray_inbox_unread_indicator'
Merge branch 'translations'
Merge branch 'master' of https://github.com/Bitmessage/PyBitmessage into translations
Corrected Russian translation.
Merge pull request #629 from yurivict/translations

Corrected Russian translations (e->ё, commas, spelling, formal style)