Optomized Image Processing.

Optimized image processing

I have re-aranged considerably the how the frames from the camera
preview are handled.  The ImageUtil libraries primary pupros
now is to process these frames.  Insteam of multile conversations to yuv
-> bitmap -> jpeg -> bitmap -> mutable bitmap -> overlay -> jpeg
we now handle all frames the same inside ImageUtils.processFrame like
this yuv -> bitmap -> mutable bitmap -> overlay -> jpeg saveing
two steps.

Note:  I am aware that in API 11 you can go directly to a mutable bitmap
without the extra step of conversion; however, the decicsion
was made at the start of the project to target API 10 and at this time
it is a decision I have choosen not to revisit.