Chat presentation enhancement

- core: message signal is not sent anymore for groupchat type, cause MUC chat server do it for us
- wix: user nick can now be specified to chat windows, usefull for colorization
- memory: full jid are now sent
- wix: message from user are now in black for group chat

tools/memory.py

@@ -489,7 +489,7 @@ class Memory:
         if not self.history[me_short].has_key(key):
             self.history[me_short][key]={}
 
-        self.history[me_short][key][int(time.time())] = (from_short, message)
+        self.history[me_short][key][int(time.time())] = (from_jid.full(), message)
         
     def getHistory(self, from_jid, to_jid, size):
         ret={}