Proposal for #475. Clarify the logic of the AssetClassifier, and make it just a module: Not sure what advantage we got from being state-ful. Tests pass.
Model classes are not defined at the time the rake task is run: At runtime I think rails autoloading gets them. Just making the hashkeys strings is a simple work-around.
Merge pull request #555 from afred/classifier-cleanup

Proposal for #475. Clarify the logic of the AssetClassifier,