View/AppUsers/login.ctp: added register link
View/AppUsers/add.ctp: reformatted, added placeholders
webroot/scss/bpt.scss: add .user-login
added Placeholders.min.js
View/AppUsers/request_password_change.ctp: reformatted
View/AppUsers/login.ctp: minor
View/AppUsers/add.ctp: submit button
View/AppUsers/reset_password.ctp: reformatted
webroot/scss/bpt.scss: minor in form
View/AppUsers/reset_password.ctp: inputDefaults