Major changes to demuxer.
Can now follow pid changes.
Merge branch 'master' of https://github.com/klammerj/dvb-vulture

Conflicts:
	common/makefile
	ncurses_remote/epg_ui.c
	stream/eit_rec.c
	stream/makefile
	stream/pidbuf.c
	stream/selector.c
Demuxer redesign