Somehow the MUS147View and .xib files were missing from the previous commit.  This commit adds them back.
Completed sequencer and related UI code for Week 6 slides.
Minor cosmetic change to UI and pushing to a new Week6PostClass branch.
Support for selecting between BLIT and BLITSaw.  Added controls for sequencer playback.  Added two more notes to sequence.  Added accelerometer protocol/delegate to MUS147View.
Merge branch 'Week6PostClass'

Conflicts:
	Music147_2013/Music147_2013/MUS147View.h
	Music147_2013/Music147_2013/MUS147View.m
	Music147_2013/Music147_2013/en.lproj/MUS147ViewController.xib
After fixing conflicts after merging.