* Prevent different identities from a same SSO provider from accessing a same account * Lock auth provider changes behind `ALLOW_UNSAFE_AUTH_PROVIDER_REATTACH=true` * Rename methods to avoid confusion between OAuth and OmniAuth
* Cas authentication feature * Config * Remove class_eval + Omniauth initializer * Codeclimate review * Codeclimate review 2 * Codeclimate review 3 * Remove uid/email reconciliation * SAML authentication * Clean up code * Improve login form * Fix code style issues * Add locales