Initial commit: Setup / Axis 1 compatibility

* Basic setup for building egg (requires setup tools)
* Some Axis 1 compat issues (remove mustUnderstand, C14N).
Try to automate installing of dependencies.
Remove C14N again, already done by PyXMLSec

Before I thought that C14N was not correctly working for Axis 1.
Now I tested it again, and the C14N used is correct and works
with Axis 1.