* Moves all authentication providers to Adapter/Auth
* refactors specs
* Deprecates oauth option in favor of auth option
- Deprecates facebookAppIds option (in favor of auth.facebook.appIds)
- Adds warnings about the deprecated options
* nits
* Add unique indexing
* Add unique indexing for username/email
* WIP
* Finish unique indexes
* Notes on how to upgrade to 2.3.0 safely
* index on unique-indexes: c454180 Revert "Log objects rather than JSON stringified objects (#1922)"
* reconfigure username/email tests
* Start dealing with test shittyness
* Remove tests for files that we are removing
* most tests passing
* fix failing test
* Make specific server config for tests async
* Fix more tests
* fix more tests
* Fix another test
* fix more tests
* Fix email validation
* move some stuff around
* Destroy server to ensure all connections are gone
* Fix broken cloud code
* Save callback to variable
* no need to delete non existant cloud
* undo
* Fix all tests where connections are left open after server closes.
* Fix issues caused by missing gridstore adapter
* Update guide for 2.3.0 and fix final tests
* use strict
* don't use features that won't work in node 4
* Fix syntax error
* Fix typos
* Add duplicate finding command
* Update 2.3.0.md
