updated silkscreens on stonyman imager board

now the VADC/VCC 0 Ohm pad makes more sense
fixed silkscreen for centering stonyman pixel area

the crosshairs silkscreen for the stonyman die are now targetting the
center of the pixel plane rather than the center of the stonyman die
created stonyman-imager-board.cam

forked 2LPlus-Sunstone.cam to create stonyman-imager-board.cam.  The
stonyman-imager-board.cam reverses top and bottom when generating gerber
files.
generated gerbers for stonyman-imager-board
updated stonyman-imager-board with DIGIKEY info

now, a bom can be created by running "bom.ulp" from Eagle and checking
the box to also include attributes.  all parts in this board now have
DIGIKEY attributes.
created BOM for stonyman-imager-board
renamed stonyman-imager-board to imager-adc, pt 1

files have been renamed, but no files have changed.  files will change
in pt 2 of this commit.
renamed stonyman-imager-board to imager-adc, pt 2

actually changing files now.  reopened and closed eagle.epf.  updated
doc/.gitignore and doc/create-pdf.sh.  also, updated 2 gerber files by
hand.
added the lab frame to the schematic file.
added revision silk screen to imager-adc

it's a letter (in this case, b) in a circle
updated gerbers and documentation pdf
added v1.0 of stonyman imager user manual
updated board layout to bridge grounds beneath ADC

which is supposed to be good practice in mixed digital/analog design
updated gerbers and board document
added terraswarm poster template and example
added EGS 2013 abstract
added EGS 2013 poster and abstract template
first draft of terraswarm annual 2013 poster

based on my EGS 2013 poster.
added PDF version of TerraSwarm Annual 2013 poster