SàT: multi-profile: DBus signals and frontend adaptation (first draft)

- Quick App: new single_profile parameter in __init__ (default: yes), used to tell if the application use only one profile at the time or not
- Quick App: new __check_profile method, tell if the profile is used by the current frontend
- Quick App: new methods plug_profile, unplug_profile and clear_profile, must be called by the frontend to tell which profiles to use
- DBus Bridge: new methods getProfileName, getProfilesList and createProfile

plugins/plugin_xep_0054.py

@@ -91,7 +91,7 @@ class XEP_0054():
         if not old_value or value != old_value:
             cache[name] = value
             self.host.memory.setPrivate("vcard_cache", self.vcard_cache)
-            self.host.bridge.updatedValue('profile_'+name, {'jid':jid.userhost(), name:value})
+            self.host.bridge.updatedValue('card_'+name, {'jid':jid.userhost(), name:value})
 
     def get_cache(self, jid, name):
         """return cached value for jid