reorganizing directories

The directory structure of AgileWiki has been stable for some time now. But I want to change a few things. In fact, I want to turn it inside out! AgileWiki is a web server, so why not put all the source and internal documentation in its htdocs directory?

So here's the change:

• AgileWiki2.1/tkcs/tests becomes the top-level directory;
• AgileWiki2.1 then is placed under tests/htdocs;
• AgileWiki2.1 becomes the src directory; and
• tests becomes the AgileWiki directory.

One consequence of this is that we can eliminate the crark script.

Another consequence is that we can set the PYTHONPATH variable within the various scripts, allowing the same system to host multiple versions of AgileWiki.

But a more interesting consequence is that we then have the option of migrating, over time, the internal documentation into the AwDocs cabinet.