gitter: Add limit to query room occupants

The limit parameter was not used which defaults to 30
and fails to return all the members in the room.

Closes errbotio#38

gitter.py

@@ -153,12 +153,13 @@ class GitterRoom(Room):
     def invite(self, *args) -> None:
         pass
 
-    def __init__(self, backend, idd, uri, name):
+    def __init__(self, backend, idd, uri, name, user_count):
         self._backend = backend
         self._name = name
         self._uri = uri
         self._idd = idd
         self._joined = False
+        self._user_count = user_count
 
     def join(self, username=None, password=None):
         log.debug("Joining room %s (%s)" % (self._uri, self._idd))
@@ -185,6 +186,10 @@ def name(self):
     def joined(self):
         return self._joined
 
+    @property
+    def user_count(self):
+        return self._user_count
+
     exists = True  # TODO
 
     def destroy(self):
@@ -208,7 +213,7 @@ def topic(self):
     @property
     def occupants(self):
         occupants = []
-        json_users = self._backend.readAPIRequest('rooms/%s/users' % self._idd)
+        json_users = self._backend.readAPIRequest('rooms/%s/users?limit=%s' % (self.idd, self.user_count))
         for json_user in json_users:
             occupants.append(GitterRoomOccupant.build_from_json(self, json_user['id']))
         return occupants
@@ -369,7 +374,7 @@ def rooms(self):
             if not json_room['oneToOne']:
                 log.debug("found room %s (%s)" % (json_room['name'], json_room['uri']))
                 rooms.append(GitterRoom(self, json_room['id'], json_room['uri'],
-                                        json_room['name']))
+                                        json_room['name'], json_room['userCount']))
         return rooms
 
     def contacts(self):