Update bundled distribute 0.6 to setuptools 2.2

distribute is severely outdated, and its code is merged into setuptools.

This updates the included bootstrap file to setuptools' ez_setup.py,
with appropriate updates for the manifest and setup.py
Update fabricate to 1.26
Add tests_require, update first
Update virtualenv.py
Remove older tar.gzs
Add wheels for bootstrapping packaging
Add installation wheels
Add testing wheels
Use new virtualenv, pip, setuptools, wheels!!!
Move coverage to sdist so it can be built on any platform
Add argparse needed for pytest on 2.6

Rename wheels so to indicate they can be installed on 2.6
Merge pull request #302 from Ivoz/wheelygonzales

Wheelygonzales - update python packaging tools and included packages!