Made EmailType raise StopValidation on invalid emails.
Bumped the version to 0.1-alpha
Moved all error messages into type class attribute MESSAGES. A metaclass will merge all MESSAGES dicts. Pass in `messages` dict at instance level to override error messages per instance.
Bumb version to 0.2-alpha
Merge remote-tracking branch 'jokull/master' into jokull

* jokull/master:
  Bumb version to 0.2-alpha
  Moved all error messages into type class attribute MESSAGES. A metaclass will merge all MESSAGES dicts. Pass in `messages` dict at instance level to override error messages per instance.
  Bumped the version to 0.1-alpha
  Made EmailType raise StopValidation on invalid emails.

Conflicts:
	schematics/types/base.py
Allow fields to be appended to existing Model
Merge branch 'append-fields' into jokull

* append-fields:
  Allow fields to be appended to existing Model