Updated French translation

HW Key actions: Show info about overriding system defaults for navbar
Merge pull request #17 from romashko/kitkat

Updated Russian translation
Merge pull request #19 from ch-vox/patch-5

Updated French translation
More sophisticated handling of obsolete GB package
- new GB package now tries to transfer settings from the old package
- will try to uninstall old package after settings are transferred
Merge branch 'kitkat' of https://github.com/GravityBox/GravityBox.git into kitkat
Allow text translations for upgrade dialog
Changed app name to distinguish from old GB and match name in X repo
Updated Spanish translations (thanks to jvbferrer)
Fixed errors in Spanish translations...
Updated Russian translation