Modify add pip_zip to sys.path method
Use Flake8 on the test of pip's Python files
Ignore the test data's flake8 results
Run flake8 on the entire repository
Merge pull request #1515 from dstufft/more-flake8

More flake8
Use Travis to handle the Matrix
Merge pull request #1498 from dstufft/dynamic-toxenv

[WIP] Use Travis to handle the Matrix
Merge pull request #1514 from dongweiming/develop

Modify add pip_zip to sys.path method
'pip wheel' should download wheels, when it finds them
when file urls have hash fragments, check it
Merge pull request #1524 from qwcode/download_wheels

'pip wheel' should download wheels, when it finds them
fixes for downloading wheels (Issue #1112)
Merge pull request #1527 from qwcode/wheel_deps

fixes for downloading wheels (Issue #1112)
update changelog
update changelog
remove `pip wheel` warnings due to merge of #1524
Simplify __main__ logic

runner.py seemed to exist for the sole function of containing
a simple function that was called by __main__.py.

I've simply removed that file with its function moved into
__main__.py itself; no functionality should be expected to change.
Make main even simpler
Revert "Use Travis to handle the Matrix"

This reverts commit 01894aee7be04fb0756f4e73a462ccf5ae2c886f.
Cleanup after each test case