Original commit message from CVS:
* gst/gst.defs:
factory.create doesn't need a name
* gst/gst.override:
implement tp_str and tp_repr gst.Object and gst.PluginFeature
* gst/gstelement.override:
implement factory.get_pad_templates and make element.link_pads
take NULL, pads or strings as the pad argument
* gst/gstpad.override:
implement tp_getattr for GstPadTemplate