codegen/argtypes.py: Proper handling of 'caller-owns-return' for miniobjects

codegen/argtypes.py: Proper handling of 'caller-owns-return' for miniobjects

Original commit message from CVS:
* codegen/argtypes.py:
Proper handling of 'caller-owns-return' for miniobjects
* gst/gst-types.defs:
Updating parenting of classes,
added/removed/updated flags&enums
* gst/gst.defs:
Updated to current core cvs,
Added 'caller-owns-return' properties for functions/methods that require
it
* gst/gst.override:
Don't make *_[un]ref() accessible
* gst/gstbuffer.override:
* gst/gstevent.override:
* gst/gstmessage.override:
* gst/gstquery.override:
Removed hack-ish wrappers since codegenerator handles
'caller-owns-return' methods/functions
* gst/gstmodule.c: (sink_gstobject), (init_gst):
Re-enabled sink function
* gst/libs.defs:
Updated to current core cvs
Removed Adapter
* gst/pygstminiobject.c:
* gst/pygstminiobject.h:
removed _new_noref() hack