Ability to configure a list of available languages and default language

I made a service to be able to configure a list of available languages instead of making a useless request to an unknow locale file. You can specify a default language and fallback to a main language if you don't want to manage regional languages.

You can specify :
localizeProvider.languages = ['en', 'en-US', 'en-EN', 'fr'];
localizeProvider.defaultLanguage = 'en-US'

So 'es' will fallback to 'en-US', 'fr-fr' will fallback to 'fr' and 'en-EN' will be ok.