Add angular-translate
First attempt to localize - it works
Add translateLanguage directive, use it in navbar
Reset fallbackLanguage after debugging
Normalize langKeys ins translateLanguage

We don't make a difference between e.g. en_US and en for now.
Add angular-translate-static-files-loader
Safety measures in translateLanguage
Extract i18n files to own folder and load them...

only when we need them.
Adjust navbar collapse a little
Let karma know we added new modules
Try to use the translate directive - works too
Use language aliasing through $translateProvider
Hide translate from public for now

Check arethusa.js for a longer description on the reasons for this.
Merge pull request #276 from latin-language-toolkit/i18n

I18n and L10n