Updated sem and mutex destroy functions to avoid assert when argument is null.
tplay: graph and and manager state machines (WIP: http srv and flac graphs still not migrated)
Added experimental .clang-format for clang-format-3.5
Reverted last minute change that was preventing skip from working correctly (need to figure out why).
tplay: Enabled flac decoding use cases (http streaming still WIP).

--HG--
rename : examples/tplay/src/tizstreamsrvconfig.h => examples/tplay/src/tizhttpservconfig.h
tplay: http streaming graph fsm (WIP)
tplay: http srv fsm fixes (WIP)
tplay: some more work on the http srv fsm (WIP)
tplay: dispatch_cmd now virtual instead of static (http srv fsm WIP)
Added tizgraphstate.h