Updated Gruntfile for the new interpolation key in i18nextract config
Replace $window dependency by $translate (angular-translate) in Comprehension
Now we use angular-translate instead of the .navigator to detect user language.
Added HUMANIZE_EQUIVALENT translation
Created LanguageCtrl.coffee to handle language changes on the front
Removed message-interpolation include from index.html + added LanguageCtrl include
Changed the way to get user language inside Comprehension.coffee
Removed usage of message interpolation inside Humanize service, add pluralize method
Updated keys & translation into locales