added larger via with soldermask for ANALOG

this is a more accessable test point for the ANALOG signal.  It doesn't
alter the board design much, it's just a tad bigger.  Signals were
re-routed around it.

Also expanded the ground planes to fill in the area under the ADC.
expanded distance between headers and lens mount

in the board file for the stonyman-imager-board.  Also, updated the date
on the silkscreen to today's date.
removed the gerber files for the old breakout adc