Added deferred equation recognition in an attempt to pool equation
requests until they are finished being drawn.
Calibration now tries multiple "closings" of the image in parallel
Added explicit set autoexposure/focus and ways to change the exposure manually.
Some better distance calculation for neighboring equations
Integrated manual exposure changing.
New Foreground filter pass removes obvious background (way too dark).
Updated "findCalibrationCorners" in ImageUtils to perform closing and multiple parallel chessboard matchings.
Implemented obvious background masking for background removal.
No real noticeable difference in performance, however.
Took out delayed autofocus, autoexposure setting in initializeCapture
Merge branch 'boardvision' of github.com:jbrowne/UCSBsketch into boardvision
Foreground filter uses the correct image size, and resets warp corners with
'R' instead of a 5th click
Tim's fix for chessboard calibration
Merge branch 'boardvision' of github.com:jbrowne/UCSBsketch into boardvision
obvious Background has to be more obvious now (was filtering out legitimate whiteboard space).
Board Change watcher now filters out differences caused by projector augmentation.
Can now set Exposure to an absolute value.
Fixed the errant line bug by finishing a stroke evey time with drawStroke
Revert obvious background  from remove Background
BoardChangeWatcher now tries to filter out edge-artifacts

Moved saveimg and show to ImageUtils
Fixed saveimg to actually work.
Some code cleanup/refactoring