File Revision
Add File Revert api call
Download dir api call
Add Shared Files api call
Add Virtual Repos api call
Add Dir Share api call
Merge branch 'FileRevision' of git://github.com/urg/seahub into urg-FileRevision

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

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

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

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

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

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

Conflicts:
	seahub/api2/views.py