* New upstream stable release (51.0build2)
  - see USN-3175-1
* Refresh patches:
  - update debian/patches/support-coinstallable-trunk-build.patch
  - update debian/patches/unity-menubar.patch
* Remove unused --with-google-oauth-keyfile option
  - update debian/config/mozconfig.in
  - remove debian/go
* Refresh patches:
  - update debian/patches/ubuntu-search-defaults.patch
* Add Kabyle language pack
  - update debian/config/locales.all
  - update debian/config/locales.shipped
  - update debian/control