Fix spacing after comment hash.

Add missing whitespace after comma.

Add tests for MANIFEST.in

numpy.distutils and distutils._msvccompiler compatibility

Upgrade pyparsing to version 2.1.8

Fix comparison with None.

Fix spacing after comment hash.

Add missing whitespace around operators.

Remove whitespace around parameter = sign.

Agree with @pitrou comment.

- Fix compatibility between `numpy.distutils` and `distutils._msvccompiler`. See #728 : Setuptools 24 `msvc.py` improvement import `distutils._msvccompiler` (New Python 3.5 C compiler for MSVC >= 14), but this one is not compatible with `numpy.distutils` (because not patched with `numpy.distutils.ccompiler.gen_lib_options`) and return unquoted libpaths when linking. The problem was patched in Numpy, but need to be patched also in Setuptools for compatibility between older versions of Numpy and `distutils._msvccompiler` (and indirectly Setuptools > 24).
- Replace some residuals `except Exception`.

Bundle the license

Update tox.ini envlist to match supported Pythons

Pythons 3.1, 3.2 are no longer supported, but Python 3.5, Pypy, and
Pypy3 are.

bump certifi to 2016.8.8

Add LICENSE file for expectant auditors

The classifier in setup.py should be enough for most auditors, but some
have automated tooling that checks for LICENSE files and reads those.
This helps all auditors (downstream redistributors and users) who can
not just rely on the classifier.

Related to #612