Register testing workflow spec in development.

It is useful to have a workflow spec for testing.
Reimplement permission discover by getting it from the plone site. Fixes #5.

Only about one fourth of the permissions have an IPermission utility.
The plone ac_inherited_permissions method returns all permissions listed in manage_access.
Update default action groups: do not use IPermission utility for permission discovery.
Rename actiongroups.zcml to lawgiver.zcml. Closes #4