Revised ChipKIT code and augmented documentation
Update analogShield.h

Revised ChipKIT code and augmented documentation
Update passthrough.ino

Revised ChipKIT code and augmented documentation
Update quantization.ino

Revised ChipKIT code and augmented documentation
Update ramp.ino

Revised ChipKIT code and augmented documentation
Update sampleRate.ino

Revised ChipKIT code and augmented documentation
Merge branch 'patch-1'
Merge branch 'patch-2'
Merge remote-tracking branch 'origin/patch-3'
Merge remote-tracking branch 'origin/patch-4'
Merge remote-tracking branch 'origin/patch-5'
Merge branch 'patch-6'