Modify(register.js): add scope property requestIsSent.
Modify(register.html): add 'ng-disabled' to button 'Register'.
Modify(userForm.js): add validators for password and passwordConfirm.
Modify(userform.tpl.html): add username, password and passwordConfirm fields to form; remove testField.
Fix(backend/pom.xml): set artifactId to 'backend' instead of 'bank-server'.