fixing 2576, 2577, 2578, 2579 and 2580.

	* components/adapter/nautilus-adapter-embed-strategy.h,
	components/adapter/nautilus-adapter-embed-strategy.c: Abstract
	interface for embedding various kinds of Bonobo components.
	* components/adapter/nautilus-adapter-embed-strategy-private.h:
	Header inclusing a `protected' call to emit a signal.
	* components/adapter/nautilus-adapter-control-embed-strategy.h,
	components/adapter/nautilus-adapter-control-embed-strategy.c:
	Concrete subclass for embedding a Control.
	* components/adapter/nautilus-adapter-embeddable-embed-strategy.h,
	components/adapter/nautilus-adapter-embeddable-embed-strategy.c:
	Concrete subclass for embedding an Embeddable.
	* components/adapter/Makefile.am: Add new files.

	* components/adapter/nautilus-adapter-progressive-load-strategy.c
	(nautilus_adapter_progressive_load_strategy_load_location): Fixed
	incorrect GnomeVFSFIleInfo handling and removed a printf.

	* components/adapter/nautilus-adapter-stream-load-strategy.c:
	(nautilus_adapter_stream_load_strategy_load_location,
	nautilus_adapter_stream_load_strategy_stop_loading): Removed print
	statements.

	* components/adapter/nautilus-adapter.c:
	(nautilus_adapter_destroy): Free stuff.

	(nautilus_adapter_new): Use the new embed strategy stuff.

	(nautilus_adapter_open_location_callback): callback for signal
	handler attached to embed strategy.

	* src/nautilus-view-frame-bonobo-control.c,
	src/nautilus-view-frame-bonobo-embeddable.c: Removed.
	* src/nautilus-view-frame-private.h, src/Makefile.am: Remove
	mentions of the two preceding files.

	* src/nautilus-view-frame.c (nautilus_view_frame_load_client): Use
	the adapter to host non-nautilus-native components.

	* nautilus-clean.sh: Added image view.