Changed createGroup to: createGroup($name, $descrpition)
Fixed showAction so a groups name is displayed correctly
Altered addActivity so that you can publish activities in a users feed for a specific group
Changed feedUri for groups from ...&actorUri=<>&groupUri=<> to : ...&uri=<actorUri><groupUri>
Now using a made up actor consisting of both the user- and the groupuri for activities
Update feedToActivities to publish group activitiyUri
Updated createGroup in GroupController
Merge branch 'Story3_jan' into Story3

Conflicts:
	classes/Xodx/GroupController.php
Merge branch 'Story3_henrik' into Story3
Reinserted joinGroup in createGroup
Merged branch Story3_Gunnar