Documents the following APIs: * [Delete stored script][0] * [Get stored script][1] * [Get script contexts][2] * [Get script languages][3] [0]: https://github.com/elastic/elasticsearch/blob/master/rest-api-spec/src/main/resources/rest-api-spec/api/delete_script.json [1]: https://github.com/elastic/elasticsearch/blob/master/rest-api-spec/src/main/resources/rest-api-spec/api/get_script.json [2]: https://github.com/elastic/elasticsearch/blob/master/rest-api-spec/src/main/resources/rest-api-spec/api/get_script_context.json [3]: https://github.com/elastic/elasticsearch/blob/master/rest-api-spec/src/main/resources/rest-api-spec/api/get_script_languages.json
