PHP XMLRPC Contribution

This is an extention / branch of the popular phpxmlrpc open source project, which can be found at http://phpxmlrpc.sourceforge.net. This branch contains the following enhancements:

• Improved seamless integration with PHP functions, no need to unwrap/wrap parameters or return values
• Support for an 'Error' class to instantiate and return from a method to generate a fault response
• Invoke methods on an instance of a class given an $EXPORTS class member
• Various bug fixes to the original source