Add owner feature in order to know the owner of a current struct attribute/value or the owner of a current function. The owner must be a WsdlToPhpModel object type.
Ensure case sensitive unique naming of methods (setters, getters and operations) by using generic WsdltoPhpModel::uniqueName() method.
Sort case sensitively return types in the getResult() method php doc.
Refactoring WsdlTophpStructValue::getCleanName() method fixes #6 Github issue concerning PHP Warning : Strict Standards: Declaration of WsdlToPhpStructValue::getCleanName() should be compatible with WsdlToPhpModel::getCleanName() in WsdlToPhpStructValue.php on line 107
