Morpfw

--------------------

- hidden fields marker support

--------------------

- Added OAuth2 BackendAuthenticationWorkflow support
- Update to morepath 0.19
- Deprecate MORP_WORKDIR in favor of app specific homedir
- Added initial implementation for app level config generator.
New command `morpfw genconfig`
- Refactor cli components

--------------------

- Added transition guarding capability

--------------------

- Added permission configuration method in settings.yml
- Added ability to define readonly states
- Improvement in field protection implementation

--------------------

- added workflow engine
- added metalink feature, where objects link can be recomputed
from json data structure

--------------------

- fix rtfd build issue