PSGResume bugfix

vgm2psg: warning if SFX is converted for noise channel only but...

... then uses channel 2 tone generator

PSGSilenceChannels and PSGRestoreVolumes

(useful if you need to temporary suspend audio)

vgm2psg support for PAL (50Hz) VGMs

PSGSFXCancelLoop added

Update README.md

Update README.md

Update README.md

psdecomp fixed