Enable Downloading Wheels by Default

* Switches the default in pip.index.PackageFinder to True
* Supresses --use-wheel
* Adds --no-use-wheel which prevents the use of Wheel
upgrade setuptools
Setuptools 0.6 needs --no-use-wheel
REmove problematic tests that test dead simple functionality
Remove --use-wheel from the docs
Fix the flag name
Revert "REmove problematic tests that test dead simple functionality"

This reverts commit 0f4477000c92bd84e35ac411818e9161dc8ce217.
Fix the tests
Merge pull request #1302 from dstufft/turn-wheel-on-by-default

Enable Downloading Wheels by Default