Support building wheels (PEP-427)

With that, building and uploading wheels to PyPI is only one "python
setup.py bdist_wheel" away.

Also, changes LC_ALL from C to UTF-8 to get around a bug in pip:

https://github.com/pypa/pip/issues/761

Change-Id: I508ab6436c29b23f6b8d56c0ec63eb26f3568819
Merge "Support building wheels (PEP-427)"