- added `CMS_USER_API.user_with_credential (...): detachable CMS_USER` that check if credential is valid, and return associated user.
- replaced use of `is_valid_credential` by new function `user_with_credential` .
- revisited the session auth, to allow other credential validations (other than ROC CMS auth).
- added CMS_USER_API.credential_validations to allow authenticating with system other than ROC CMS.
Added new permission to allow by-passing the default ROC-CMS user login/register management:
- new permission to edit its own account.
- new permission to edit its own password.
- new permission to view users details (mostly for user managers).
Added authentication module webapi, to provide registration via webapi.
Improved the roles display by providing table of permissions if asked.
Added various links in primary tabs to navigate back to roles or users, depending on the page.
Added datetime to-from string converters in CMS_ENCODERS.
Start removing CMS_ADMINISTRABLE.
Added permission to use simple core access token.
Added webapi for users: list, new, register.
