Added initial attempt at pitch detection.
Added NoteHead detection for quarter notes.
Added a more infrastructure for the note detection.
Merge remote-tracking branch 'remotes/origin/NoteheadDetection' into pitch_detection

Conflicts:
	src/edu/hawaii/omr/Driver.java
Integrated note head detection changes.
Refactored note detection code into existing classes.
Changed notehead detection. Will now detect quarter, half, and whole
notes.
Renamed the classes for Whole, half, and quarter note to be more clear.
Changed template matching function from cross correlation to  least
square difference.  Note that for any given match value, the smaller the
better for least square fit.
Changed wholeNote template a little bit.  Will now generate a template
that is an ellipse with a diagonal elliptical hole like a regular note.
A lot less false positives now.
Fixed a bug that caused some line-like features to be detected as staff lines.
Merge branch 'pitch_detection' of github.com:christophertfoo/OpticalMusicReader into pitch_detection
Merge pull request #5 from christophertfoo/pitch_detection

Pitch detection