Re-doing our default value stuffz.

Fixes #11. Fixes #6.
Version bump.
Updating changelog.
Adding upgrading docs.
added email fields to form, added a way to collect errors from those forms and return it to view
added form errors to views
fix formatting
Adding a postRegistrationHandler setting.

This allows users to do custom stuff after a user has registered!
Adding docs for event handlers.
Version bump.
Adding docs.
Merge pull request #13 from lemieux/form-handling

Form errors handling