Bug 956642 - [Settings] add marionette for language change

- add marionette test for language
Bug 968050 - Erase backward compatibility codes for Bug 791506
Bug 974046 - [Messages] Carrier tag bar width
Merge pull request #15033 from EragonJ/bug-956642

Bug 956642 - [Settings] add marionette for language change
Merge pull request #16635 from fabi1cazenave/smsTagBarWidth-bug974046

Bug 974046 - [Messages] Carrier tag bar width. r=schung, a=v1.4+
Merge pull request #16110 from masap/20140210

Bug 968050 - Erase backward compatibility codes for Bug 791506
Merge remote-tracking branch 'b2g/master' into bubble-tea