3.0.0a1

Second alpha release of Webware for Python 3.

Notable changes in this release:

• Ability to load plugins in non-web situations (#1)
• Fix servlet import issue (#2)
• Add docs on debugging servlets using pdb (#3)
• Fix mixin function and added unit tests (df710b6)
• Fix aliased contexts and add regression test (938657d)
• Point to externally provided MiddleKit (220791c)