2004-08-21  Sven Neumann  <sven@gimp.org>

	* app/actions/layers-actions.[ch]
	* app/actions/layers-commands.[ch]
	* app/widgets/gimplayertreeview.c: added actions to handle layer
	masks as suggested in bug #150446.

	* menus/layers-menu.xml: added menu entries for new actions,
	commented out raise/lower menu entries.