examples: update python examples

Update the raw D-Bus python examples to use newer APIs where
appropriate (and split the add-connection example into 1.0-only and
0.9-compatible versions). Update the gi-based python examples for the
various API changes since they were last updated.

Also add a comment to the ruby add-connection example pointing out
that it's still using the old settings APIs.

examples/python/gi/list-connections.py

@@ -23,21 +23,16 @@
 from gi.repository import NM
 
 # This example asks settings service for all configured connections.
-# Unfortunately, at this time since libnm still makes heavy use of
-# GValue and GHashTable (rather than GVariant), libnm isn't fully
-# usable from GObject Introspection-ready languages. Most functions will
-# work fine, but e.g. nm_connection_to_dbus() causes failures.
-
 
 def print_values(setting, key, value, flags, data):
     print "  %s.%s: %s" % (setting.get_name(), key, value)
 
 if __name__ == "__main__":
-    # create RemoteSettings object
-    settings = NM.RemoteSettings.new(None)
+    # create Client object
+    client = NM.Client.new(None)
 
     # get all connections
-    connections = settings.list_connections()
+    connections = client.get_connections()
 
     # print the connections' details
     for c in connections: