Fix various bugs in the event system

Squash many bugs in the event notification system and simplify the
code.

core/relay.py

@@ -1,7 +1,6 @@
 from twisted.internet.protocol import Protocol, Factory, ClientFactory
 from json import dumps, loads
 from copy import deepcopy
-from datetime import datetime
 
 import main
 from utils.logging.log import *
@@ -136,6 +135,4 @@ def sendRelayNotification(cast):
     for i in main.relayConnections.keys():
         if main.relayConnections[i].authed:
             if cast["type"] in main.relayConnections[i].subscriptions:
-                newCast = deepcopy(cast)
-                newCast["time"] = str(datetime.now().isoformat())
-                main.relayConnections[i].send(dumps(newCast))
+                main.relayConnections[i].send(dumps(cast))