Renamed MKSamplerInstrument to MKSamplePlayerInstrument and corrected...

Commit by leighsmith :: r3418 /trunk/MusicKit/ (17 files in 9 dirs): (link) Renamed MKSamplerInstrument to MKSamplePlayerInstrument and corrected initialisation of SndTable. Cleaned up debugging messages in MacOS X MIDI I/O and sysEx handling in MKMidi.m