Make typecasting an extensible hook instead of a hardcoded routine
Some reorganization of typecasting due to feedback
Remove <key>.<type> key when typecasting
Merge branch 'master' into issue203
Add a custom test. Move typecast table to the website object.
Merge branch 'issue203' of github.com:gittip/aspen-python into issue203
Fix up some names to be more descriptive
Fix test renaming broke
Fix more names and uses of those names.  Raise a custom ResponseType instead of a generic 404.
Fix py2.6 backcompat of .format
Update docstrings
Update docs for custom typecaster support
Merge pull request #265 from gittip/issue203

Make typecasting an extensible hook instead of a hardcoded routine