This library is no longer actively maintained in favor of three separate packages:

• InputValidation for PHP – Easy & secure whitelist validation for input data of any origin
• Doctrine ActiveRecord - Object-oriented CRUD for Doctrine DBAL
• CSS Optimizer - Minifies stylesheets by removing duplicates and combining selectors

You should be able to use those as drop-in replacements with a few minor changes. If not, please use the issue tracker or send an email to give feedback.