This reworks the plugin infrastructure so as to remove module-loading
side-effects which were making things a pain in the ass to test.
With the new system, there's no auto-registering meta class. Instead
plugins do whatever they want and then specify a hooks dict that maps
hook names to callables for the things they're tying into. The most
common one (and the only one we've implemented so far) is "setup".
This also simplifies the sampleplugin a little by moving the code
to __init__.py.
* move contents of main.py to __init__.py
* update documentation in README
* change the key/value configuration specification
* added a recipe for passing values from the url to the template
* removed some unused code
This fixes the template loader so that it can load plugin templates.
This adds code for registering template paths so that plugins can add
their own templates.
This adds the base code for the flatpagesfile plugin. It doesn't serve
pages, yet, but it's pretty close.
