Cpyext datetime2

Merged Bitbucket Importer requested to merge branch/cpyext-datetime2 into branch/default

Created originally on Bitbucket by mattip

This seems to be enough to support datetime.pxd from cython which is now used by pandas

  • move datetime type typedefs into parse, try to add a make_typedescr (for tzinfo)

  • create interp classes to hold the tzinfo field, hack till tests pass and translates

  • make headers compatible with cpython, prevent recursive tp_dealloc

Merge request reports