Merge pull request #84 from patrikohlsson/master

Conflict test
OS X MIDI device detection tests

See #40
OS X MIDI device detection tests

    See #40
Moves Signal.dls to platform directory
Fixes #77
Documents Buffer error values better
Documents platform-specific Signal.dls function
Fixes #76
Removes old comment
Updates fa_default_midi to handle errors
Merge github.com:hanshoglund/faudio

Conflicts:
	shared/CMakeLists.txt