* Add Session and some missing User docs
* Remove accidentally pasted line
* Add permissions docs
* Respond to PR comments
* Remove docs for user.create
* Add Permissions models and User Management Realm API
* docs and changelog
* fix bad merge
* add test
* fix jsdoc annotation
* rename permissions to management schema
* Pass AuthError in Realm.Sync.User methods callbacks
The new Realm.Sync.AuthError class exposes properties common to the Problem family of classes in the Realm Object Server
* extract AuthError in a separate file
* whitespace