added get_survey_locales(survey_id) function to supported list

Author: wogsland

README.md

@@ -31,6 +31,7 @@ A Python client library for the [Dynata Cmix API](https://wiki2.criticalmix.net/
     get_surveys(status, *args, **kwargs)
     get_survey_data_layouts(survey_id)
     get_survey_definition(survey_id)
+    get_survey_locales(survey_id)
     get_survey_xml(survey_id)
     get_survey_simulations(survey_id)
     get_survey_test_url(survey_id)