note duration tracking.

app/cmOnset.c
app/cmPickup.c
app/cmScore.c
app/cmScoreProc.c
app/cmTimeLine.c
cmAudDsp.c
cmAudioAggDev.c
cmAudioFileDev.c
cmAudioNrtDev.c
cmAudioPort.c
cmAudioPortFile.c
cmDevCfg.c
cmFeatFile.c
cmMidi.c
cmMidiFile.c
cmProc2.c
cmProc3.c
cmProc4.c
cmProcTest.c
cmRbm.c
cmUiRtSysMstr.c
dsp/cmDspClass.c
dsp/cmDspFx.c
dsp/cmDspNet.c
dsp/cmDspPgmKr.c
dsp/cmDspPgmPP.c
dsp/cmDspPgmPPMain.c
dsp/cmDspSys.c
dsp/cmDspUi.c

Changed the dtick to seconds/samples conversions to use doubles
instead of integers to avoid round off error.

value field.