Add a huge bunch of docstrings

lib/tfw/networking/server/tfw_server.py

@@ -15,7 +15,15 @@ LOG = logging.getLogger(__name__)
 
 
 class TFWServer:
+    """
+    This class handles the proxying of messages between the frontend and event handers.
+    It proxies messages from the "/ws" route to all event handlers subscribed to a ZMQ
+    SUB socket. It also manages an FSM you can define as a constructor argument.
+    """
     def __init__(self, fsm_type):
+        """
+        :param fsm_type: the type of FSM you want TFW to use
+        """
         self._fsm = fsm_type()
         self._fsm_updater = FSMUpdater(self._fsm)
         self._fsm_manager = FSMManager(self._fsm)