Merge "stasis: Add internal filtering of messages." into 13

apps/app_queue.c

channels/chan_dahdi.c

channels/chan_iax2.c

channels/chan_mgcp.c

channels/chan_sip.c

channels/chan_skinny.c

channels/sig_pri.c

include/asterisk/stasis.h

include/asterisk/stasis_cache_pattern.h

include/asterisk/stasis_message_router.h

main/ccss.c

main/devicestate.c

main/endpoints.c

main/manager.c

main/pbx.c

main/presencestate.c

main/stasis.c

main/stasis_cache.c

main/stasis_cache_pattern.c

main/stasis_message.c