Ignore settings file if we do not have permissions to read it.
Fixed some formatting.
Began restructure.
Rename done.
Updated NEWS
Model utils.
Work on Client.
Added main rest.py for serving all APIs.
Let Client use core model directly.
Improved session creation/loading.
Fixed tests.
Added YubiKey revocation.
Removed authenticate form core API.
Added login/logout to REST API.
Add session using HTTP headers.
Bumped version.