api call to rename repo
add api call to add user profile
api call to add a group
return newly created group_id
api calls to add/remove group members
add apis calls DownloadPrivateSharedFileView & DownloadSharedFileView
Fix error messages
Merge pull request #138 from urg/RenameRepo

api call to rename repo
Merge pull request #139 from urg/UserProfile

add api call to add user profile
Merge branch 'AddGroup' of git://github.com/urg/seahub into urg-AddGroup

Conflicts:
	seahub/api2/views.py
Merge branch 'GroupAddMember' of git://github.com/urg/seahub into urg-GroupAddMember

Conflicts:
	seahub/api2/views.py
Merge branch '23-ApiDownloadSharedFiles' of git://github.com/urg/seahub into urg-23-ApiDownloadSharedFiles

Conflicts:
	seahub/api2/views.py
Merge branch '2.0'

Conflicts:
	seahub/api2/urls.py
	seahub/api2/views.py