core, quick_frontend, primitivus, wix: Contacts List refactoring phase 1:

- QuickContactManagement is not used anymore and will be removed, ContactList + Core are used instead
	- disconnected contacts are now displayed in Primitivus (M-d to show/hide them)
	- avatars are temporary unavailable in wix
	- new bridge method: getContactsFromGroup

src/core/xmpp.py

@@ -23,6 +23,7 @@ from twisted.internet import task, defer
 from twisted.words.protocols.jabber import jid, xmlstream
 from wokkel import client, disco, xmppim, generic, compat
 from logging import debug, info, error
+from sat.core import exceptions
 
 
 class SatXMPPClient(client.XMPPClient):
@@ -164,9 +165,9 @@ class SatRosterProtocol(xmppim.RosterClientProtocol):
         """Return dictionary of attributes as used in bridge from a RosterItem
         @param item: RosterItem
         @return: dictionary of attributes"""
-        item_attr = {'to': str(item.subscriptionTo),
-                     'from': str(item.subscriptionFrom),
-                     'ask': str(item.ask)
+        item_attr = {'to': unicode(item.subscriptionTo),
+                     'from': unicode(item.subscriptionFrom),
+                     'ask': unicode(item.ask)
                      }
         if item.name:
             item_attr['name'] = item.name
@@ -235,6 +236,12 @@ class SatRosterProtocol(xmppim.RosterClientProtocol):
     def getItems(self):
         """Return all items of the roster"""
         return self._jids.values()
+
+    def getJidsFromGroup(self, group):
+        try:
+            return self._groups[group]
+        except KeyError:
+            return  exceptions.UnknownGroupError
         
 
 class SatPresenceProtocol(xmppim.PresenceClientProtocol):