libfreerdp-core: add support for RDP4 MPPC compression
libfreerdp-core: add bulk compression metrics
libfreerdp-core: enable MPPC compression by default
sound: fix random volume on connection.
sound: fix long latency.
sound: cleanup invalid code.
libwinpr-wtsapi: add missing link dependency
channels/audin: fix target export
libwinpr-wtsapi: fix linker issue
libfreerdp-core: change internal fastpath utils function declarations
Merge pull request #1736 from awakecoding/master

MPPC Bulk Compression Rewrite
cmake: added GCC hack to strip absolute path out of the __FILE__ macro
Removed WLOG traces for audio playback
Merge branch 'master' of git://github.com/awakecoding/FreeRDP
Merge pull request #1737 from zhangzl2013/sound-fix

Sound fix
xfreerdp: cleanup keyboard code
xfreerdp: add ability to script key combinations
only process msg channel pdu if msg channel is set
libfreerdp-codec: stub ncrush bulk compression
libfreerdp-codec: add NCrush unit tests and tables