Translated "More news posts" on main page
Added Globalize support for news posts
Added alert box when a translation is missing from news
Changed url-schema for default locale

Will now default to / instead if /sv when using the default locale sv.
Implemented Globalize for Posts

This means that you now have to write the Title and Body for each
available locale. Currently if you don't write these fields for some
language, there will exist a translation that is empty.

This will be fixed in a future commit.
Default to current locale as the active tab
Added validation translated accessors
Globalized translation of Committee
Added Committee-seeds with translations
Fixed a bug where the logo didn't link to the root
Globalized courses
Merge branch 'feature/globalize' into develop