In normalize_attributes_to_service, normalize include_fields, if present
In getter, return instance variable if defined (was checking for nil value)
Merge pull request #33 from chessbyte/convert_include_fields_to_xmlrpc

In normalize_attributes_to_service, normalize include_fields, if present
Merge pull request #34 from chessbyte/return_ivar_if_defined

In getter, return instance variable if defined (was checking for nil value)