Leonardo 0.2.0 Released

I've released a new version of Leonardo, the wiki/blog publishing system that is used to produce this site.

Changes:

• reorg of directory structure to more cleanly separate cgi code, modules, config and data
• no longer has to run directly under /
• support for "amazon:" tag in wiki to link to Amazon.com by ISBN
• fixed bug that prevented static file serving
• fixed bug that resulted in exception when accessing a non-existent blog year/month/day