Add guard and guard spark for faster local dev tdd
(migration) Admin::Project Add pub_interval method

and tests.

MIGRATION: Add pub_interval to Admin::Project

views/admin/project/edit|show : Update the text help for PUB interval.
Update JNLP helper to use Admin::Project pub interval.
Guardfile: Adjust path to lib tests to match our setup.
Add tests for PadletWrapper
PadletWrapper : remove some methods from the public.
PadletWrapper : Extract Padlet Constants.
PadletWrapper :  JSON results are in the response body.
PadletWrapper : add method make_public.  Also, walls public by default.