numerics: revision graph

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fix syntax error
Sat, 28 Feb 2015 16:59:08 -0800, by Jeff Hammel
stub histogram tests
Sat, 28 Feb 2015 16:13:14 -0800, by Jeff Hammel
fix test
Sat, 28 Feb 2015 14:51:10 -0800, by Jeff Hammel
minor cleanup and better error
Sat, 28 Feb 2015 13:51:40 -0800, by Jeff Hammel
wip
Fri, 27 Feb 2015 13:34:05 -0800, by Jeff Hammel
stubbing
Thu, 26 Feb 2015 15:48:19 -0800, by Jeff Hammel
stubbing: unicode histograms
Thu, 26 Feb 2015 15:12:48 -0800, by Jeff Hammel
stub concatenating columns
Mon, 23 Feb 2015 10:50:13 -0800, by Jeff Hammel

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