[FIX] Handle integer values in params
[IMP] Support compatibility blueprints

They contain rules redirecting to the pretty urls.
Any rule from such a blueprint is also skipped by the legacy rule
generation tool
[IMP] Use clean URLs for categories
[FIX] Scoping problem

Owned by non-existant block scope, yay!
[IMP] Add url converter to handle lists
[REF] request.url instead of getCurrentURL
[MIN] remove obsolete and overly long docstring
[REF] Get rid of "is types.StringType" check

It's extremely ugly and breaks with unicode objects
[FIX] JS BuildError not shown properly in chrome
[FIX] Accept some "bad" params in JS rouding

useful e.g. in the material editor