* camel-object.c: New subclass of GtkObject which is now the base
	of the Camel object hierarchy. Currently the only difference
	between CamelObject and GtkObject is that CamelObjects don't start
	out floating.

	* *.h: Move a bunch of typedefs to camel-types.h. Standardize on
	using <camel/foo.h> in header files rather than <foo.h>, "foo.h",
	or "camel/foo.h". Remove some unneeded includes.

	* camel-address.c, camel-data-wrapper.c, camel-folder-search.c,
	camel-folder-summary.c, camel-folder.c, camel-mime-filter.c,
	camel-mime-parser.c, camel-service.c, camel-session.c,
	camel-stream.c: These are now subclasses of CamelObject.

	* camel-data-wrapper.c (set_output_stream):
	* camel-medium.c (set_content_object):
	* camel-seekable-substream.c
	(init_with_seekable_stream_and_bounds):
	* providers/mbox/camel-mbox-folder.c (mbox_get_message_by_uid):
	remove gtk_object_sink calls.

	* camel-stream-buffer.c (init_vbuf):
	* camel-stream-filter.c (camel_stream_filter_new_with_...