support np.datetime64[foo] dtypes
support np.datetime64[foo] dtypes

ContinuumIO/datashape,cowlicks/datashape,cpcloud/datashape,blaze/datashape,ContinuumIO/datashape,quantopian/datashape,cowlicks/datashape,llllllllll/datashape,quantopian/datashape,llllllllll/datashape,blaze/datashape,cpcloud/datashape