3.0.0b0

First beta release of Webware for Python 3.

Notable changes in this release:

• Properly shut down on SIGTERM and SIGHUB (d5670ec, 0cf313d)
• Minor improvements in the URL parser (particularly, files containing plus signs could not be served) (e911361)
• Point to the new location of the repositories in the WebwareForPython organization (5ef47e5, 027836f)