Message 202620 - Python tracker

Aside from the default-install -> default-pip name change, the other fixes/changes between Donald's last patch and the committed version:

- added the missing docs for the new options
- updated What's New, ACKS, NEWS
- avoided repetition in the test code by using setUp and addCleanUp appropriately (this also prevented the earlier tests from altering os.environ)
- marked the .whl as binary in .hgeol