I added a Pairwise Image Comparison Cell#22

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meawoppl wants to merge 4 commits intoplasmodic:masterfrom

meawoppl:master

Commits on Dec 19, 2011

Changed return code to ecto::OK as opposed to 0.
meawoppl
committed

Commits on Jan 22, 2012

Added pairwise compairson cell. See docs for more details. Likely does not work with parallel schedular atm . . .
meawoppl
committed
Changed zero returns inside process commands to ecto::OK.
meawoppl
committed

Commits on Jan 25, 2012

Added threadunsafe flag to the cell.
meawoppl
committed