Add HTTPS server code

Can use use WarpTLS instead of Warp when required (commented out).

Also delete sqlite file on startup since it seems to cause migration
problems when reused.
SCIM user creation

Add support for creation of users using SCIM data. 

* Persist function which stores the JSON data.
* BCrypt hashing of passwords.
* UUIDs for user ID fields.

REST API is not implemented yet.