Add support for census 2010#4

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mattwigway wants to merge 27 commits intomigurski:masterfrom

mattwigway:census2010

Commits on Jul 27, 2014

Commits on Jul 30, 2014

Fix bug with running from other direction.
mattwigway
committed

Commits on Jul 31, 2014

Commits on Aug 10, 2014

Put back accidentally-deleted files from 2000.
mattwigway
committed