Bug 925787 - separate fallback locale for fhr mobile from fhr desktop

* have a new list of fallback just for mobile: settings.LANG_MOBILE_FALLBACK
* Create symlinks for the mobile folder only based on the above list instead of having a general fallback
Merge pull request #152 from pascalchevrel/Bug-925787_fhr_mobile_locales_fallback_support

Bug 925787 - separate fallback locale for fhr mobile from fhr desktop
Update the list of locales that need to fallback to en-US because they haven't finished/done the translation for fhr mobile
Merge pull request #153 from pascalchevrel/Bug-925787_fhr_mobile_locales_fallback_support

Update list of locales with a fallback for fhr mobile
Remove hu and pl from mobile redirects

Hu is now complete, pl is only 3 strings behind and probably going to
fix it in the next hours.
Merge pull request #154 from flodolo/reenable_plmobile

Remove hu and pl from mobile redirects
Remove fallback for pt-BR mobile

Locale is now completely translated
Merge pull request #155 from flodolo/enable_ptBRmobile

Remove fallback for pt-BR mobile
Fix Bug 932780, add gruntjs tasks to travis
Merge pull request #156 from ossreleasefeed/setup-gruntjs-jshint-for-travis

Fix Bug 932780, add gruntjs tasks to travis r=laura
added git repo bits
Merge pull request #157 from ossreleasefeed/nobug-add-repo-to-packagejson

added git repo bits r=laura
Remove 'tr' from mobile fallbacks

File is completely localized.
Merge pull request #158 from flodolo/enable_tr_mobile

Remove 'tr' from mobile fallbacks