use fast test environment for setuptools and distribute
simplify sitecustomize tests
reset_env tests
better debugging for sitecustomize test
Ship CA certificates in get-pip.py

This will allow rebuilding the get-pip script with
a recent pip version, one that downloads pip more securely.
get-pip.py: accept cli flags
get-pip.py: rebuild
more debugging for sitecustomize patch test
delete __pycache__ after sitecustomize updates
Use quoted-printable as the inner encoding.

This compresses a lot more efficiently (get-pip.py.gz is within 12% of tar czf).
get-pip.py: rebuild

quoted-printable is a size gain of about 30%, before or after gzipping.
Use bz2 instead of gzip as the intermediate encoding.

bz2 is available since Python 2.3.
get-pip.py: rebuild

Now we're down to 267K, 202K gzipped.
remove python 2.5 logic
Add a User Agent so that pip is identifiable in logs
improve method for getting home scheme purelib
Remove commented out code that was mistakenly left in
'irregardless', if it's a word at all, means the opposite of how it's meant here.
deal with pre-existing build dirs
pep8 comment fix