Friendships

Now possible to add/remove/list your friends via the database.
Fixed mergeconflicts
Merge pull request #50 from SimonHietala/master

Friendships
added get_friends_list wraper function to make code more clear
Merge pull request #51 from Gegga87/master

added get_friends_list wraper function to make code more clear
implemented correct error messages for login and registration. Added error_code for internal protocol errors to handle errors rather than just pass a message describing the error
Merge pull request #52 from ahlen/master

implemented correct error messages for login and registration. Added err...
Merge branch 'master' of github.com:quizzingbricks/quizzingbricks-core