Login buttons styles.
Login link fixed.
LoginCommand, login page added, stylesheet modified.
Styles modified.
Custom login implementation.
Register user implementation.
User login and register refactored, user helper implemented. New library
used - apache commons lang.
User registration. Unique fields validation.
Refactoring static methods from User into AppUtils class.
CSRF protection for login and register forms. Some constants moved to a
separate class.
Merge pull request #9 from bancer/simple-auth

Simple auth