fix heroku warning on node versions > sign
refactor models to hide persistence implementation
integration tests auto-configure the port and scheme
fix oauth2 decision dialog for cas trusted clients
add CAS 1.0 and 2.0 integration tests
Add CAS OAuth Server integration test
switch theme to bootswatch readable to differentiate phone client
refactor client model to persist using mongoose
refactor access token model to persist using mongoose
refactor refresh token and authorization code models to persist using mongoose