core: sendMessage refactoring:

- sendMessage now use JID instead  of unicode, bridge method using unicode is now _sendMessage
    - added no_trigger argument, so it's now possible to forbid trigger execution (to avoid any plugin when we send a message)

src/plugins/plugin_exp_parrot.py

@@ -94,7 +94,7 @@ class Exp_Parrot(object):
 
                 linked = _links[from_jid.userhostJID()]
 
-                self.host.sendMessage(unicode(linked), msg, None, "auto", profile_key=profile)
+                self.host._sendMessage(unicode(linked), msg, None, "auto", profile_key=profile)
         else:
             warning("No body element found in message, following normal behaviour")