Update analogShield.cpp

didn't commit this change when I initially added it
Merge pull request #7 from mwingerson/patch-6

Update sampleRate.ino
Merge pull request #6 from mwingerson/patch-5

Update ramp.ino
Merge pull request #5 from mwingerson/patch-4

Update quantization.ino
Merge pull request #4 from mwingerson/patch-3

Update passthrough.ino
Merge pull request #3 from mwingerson/patch-2

Update analogShield.h
Merge pull request #2 from mwingerson/patch-1

Revised ChipKIT code and augmented documentation
Merge pull request #1 from mwingerson/master

Update analogShield.cpp
Merge remote-tracking branch 'origin/master'