Moved remaining files to folder for grouping
Converted the Language model to a repository
Converted Problems to a repository
Converted Solution States to a repository
Moved Solution to a Repository
Merge branch 'feature/resolve-35' into develop

Resolves #35. However, this is only a shallow change.
There's a lot of logic in the Solution class that needs
to be moved out and become more testable. Furthermore,
all of the database-driven tests need to be refactored.
Alas...

Conflicts:
	app/controllers/TeamController.php