Remove forbidden keyword 'class' from variable names
Node 0.6 gets angry.

npm ERR! Couldn't read dependencies.
npm ERR! Error: Invalid 'version' field: 0.4
npm ERR! 'version' Must be X.Y.Z, with an optional trailing tag.
npm ERR! See the section on 'version' in `npm help json`
Add `dcrypt` as a submodule until upstream update