User seafserv_rpc instead of seafile_rpc and add repo management for staff

base/middleware.py

@@ -2,6 +2,7 @@
 from seahub.profile.models import UserProfile
 
 class UseridMiddleware(object):
+    """Store ccnet user id in request.user.user_id"""
 
     def process_request(self, request):
         if not request.user.is_authenticated():