Fixes make_zip.py to create temporary .pyc files in a separate directory. This avoids polluting tests that run code from TEMP.

Patch by Gustavo J. A. M. Carneiro.

Patch by Gustavo J. A. M. Carneiro.

Patch by Gustavo J. A. M. Carneiro.

This includes removing the assumption that readers will be familiar with the
name resolution scheme Python used prior to the introduction of lexical
scoping for function namespaces.

Patch by Ivan Levkivskyi.