Releases for Comment Registration

- Configure Comment Registration to be optional or mandatory
- Profile2 integration
- Email Registration support
- Lots of little things that up to one great big thing!

Initial D7 version.

Works a little differently than the d6 version:

1. enabled per content type in the content type comment settings fieldset
2. requires anonymous commenting set to either "Anonymous posters may enter their contact information" or "Anonymous posters must enter their contact information" (doesn't work with "Anonymous posters may not enter their contact information").
3. New: now handles required user fields and allows other modules to alter the registration form.