Correct the handling of SoapFault responses (#1)

This is to fix issue #1.  Specifically, it:

1. prevents the internal "rejigging" from breaking SoapFault parsing (68b5d27);
2. updates the service method exception handlers to correctly return the parsed `SoapFault` objects (277a942);
3. updates the `example.php` script to include one example of detecting / printing SoapFault responses (277a942).