Rename Xml to XmlParser.
Merge branch 'rename-parser' into develop
Return PHP object when calling an API operation.

The correct PHP object is now created and populated from the XML
response when calling an API operation.
Merge branch 'api-request' into develop
Throw UnknownConfigurationOptionException.

Getting or setting an invalid configuration option will now result in
the UnknownConfigurationOptionException been thrown.
Merge branch 'exceptions' into develop