* libanjuta/Makefile.am, libanjuta/libanjuta.h,
	libanjuta/anjuta-serializer.[ch]: Implemented serialization
	class.

	* plugins/message-view/anjuta-msgman.c,
	plugins/message-view/anjuta-msgman.h,
	plugins/message-view/message-view.c,
	plugins/message-view/message-view.h,
	plugins/message-view/plugin.c: Serialize messages panes in
	session save and deserialize them in session load so that
	build messages persistant.