[Python] pyarrow 0.4.0 on pypi is missing pxd files

[asfimport]

pip install pyarrow==0.4.0 does not install the pxd files found in python/pyarrow/includes.

This prevents use of pyarrow Cython code downstream; something as simple as from pyarrow.lib cimport Array fails due to

/Users/jhscott/.virtualenvs/arrow_cython/lib/python2.7/site-packages/pyarrow/lib.pxd: cannot find cimported module 'pyarrow.includes.libarrow'
/Users/jhscott/.virtualenvs/arrow_cython/lib/python2.7/site-packages/pyarrow/lib.pxd: cannot find cimported module 'pyarrow.includes.common'

Manually copying these pxd files from the arrow source tree into the location Cython complains about fixes the problem.

See https://github.com/snakescott/arrow_cython for an example repro.

Reporter: Jacob Scott / @snakescott
Assignee: Jacob Scott / @snakescott

_{Note: This issue was originally created as ARROW-1086. Please see the migration documentation for further details.}

[asfimport]

Wes McKinney / @wesm:
Would you like to submit a patch to copy these files during setup.py install?

[asfimport]

Jacob Scott / @snakescott:
sure!

[asfimport]

Wes McKinney / @wesm:
Issue resolved by pull request 733
#733