Change default priority to "medium", add priority lower than "low" ("monitor")

EventManager.py

@@ -4,8 +4,9 @@ PRIORITY_URGENT = 0
 PRIORITY_HIGH = 1
 PRIORITY_MEDIUM = 2
 PRIORITY_LOW = 3
+PRIORITY_MONITOR = 4
 
-DEFAULT_PRIORITY = PRIORITY_LOW
+DEFAULT_PRIORITY = PRIORITY_MEDIUM
 DEFAULT_DELIMITER = "."
 
 class Event(object):

modules/to.py

@@ -4,7 +4,7 @@ class Module(object):
     def __init__(self, bot, events, exports):
         events.on("received").on("message").on("channel"
             ).hook(self.channel_message,
-            priority=EventManager.PRIORITY_MEDIUM)
+            priority=EventManager.PRIORITY_HIGH)
         events.on("received").on("command").on("to").hook(
             self.to, min_args=2, help=("Relay a message to a "
             "user the next time they talk in a channel"),