Added waveforms to DiskSystem sound chip emulation.
Added volume envelopes to DiskSystem sound chip emulation.
Computing effective waveform power when simulating samples via MIDI.
Fixed triangle channel volume when playing via MIDI.
Fixed "Hit MIDI Drums" option in iNES-Windows.
Added "Nearest Neighbor" option to disable linear interpolation.
DiskSystem disks now get loaded starting with side A.