Add column types#4

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ihaque wants to merge 5 commits intogulopine:masterfrom

counsyl:add_column_types

Commits on Nov 4, 2013

Replace \n\r line endings with \n line endings
Imran Haque
committed
Fix compatibility for Python 2
Imran Haque
committed
Add new column types
Imran Haque
committed
Fix datetime tests
Imran Haque
committed
Add tests to new column types
Imran Haque
committed