Upgraded to HTMLPurifier 4.6
Updated to work with CakePHP 2.4
removing the bundled HTMLPurifier.
I think this fixes the method signatures.
implemented the class_exists() method to verify if HTMLPurifier needs to be loaded or not.
Changed to Hash::merge to correctly merge recursive arrays.
Added additional config options to remove empty html tags.
Merge pull request #3 from JustAWebDev/master

Some updates