core: improved roster management + misc:

- updated methods to no use anymore methods deprecated in Wokkel
    - use of full jid when it make sense instead of bare jid
    - getContacts, updateContact and delContact are now asynchronous

src/bridge/bridge_constructor/bridge_template.ini

@@ -255,12 +255,13 @@ doc=Tell if a profile is connected
 doc_param_0=%(doc_profile_key)s
 
 [getContacts]
+async=
 type=method
 category=core
 sig_in=s
 sig_out=a(sa{ss}as)
 param_0_default="@DEFAULT@"
-doc=Return information about all contacts
+doc=Return information about all contacts (the roster)
 doc_param_0=%(doc_profile_key)s
 doc_return=array of tuples with the following values:
  - JID of the contact
@@ -508,6 +509,7 @@ doc_param_0=entity_jid: JID to add to roster
 doc_param_1=%(doc_profile_key)s
 
 [updateContact]
+async=
 type=method
 category=core
 sig_in=ssass
@@ -520,6 +522,7 @@ doc_param_2=groups: list of group where the entity is
 doc_param_3=%(doc_profile_key)s
 
 [delContact]
+async=
 type=method
 category=core
 sig_in=ss