Merge pull request OAI#307 from RobWin/swagger2markup

Added swagger2markup to tools list.

Author: webron

README.md

@@ -97,6 +97,7 @@ These are third party tools generated by the Swagger community:
 - [dropwizard-swagger](https://github.com/federecio/dropwizard-swagger) - A dropwizard bundle that wraps Swagger-Core.
 - [swaggerapi](https://github.com/ROAMSYS/swaggerapi) - Creates a Swagger resource listing suitable for feeding to swagger-ui by annotating your classes and methods and handles API calls to those methods
 - [swagger-validator](https://github.com/kenshoo/swagger-validator) - Validates that definitions in a swagger.yaml match the actual Java code.
+- [swagger2markup](https://github.com/RobWin/swagger2markup) - A Swagger to Markup (AsciiDoc and Markdown) converter. The Swagger2MarkupConverter takes a swagger.json or swagger.yaml file as source and converts it into an AsciiDoc or Markdown document. The Swagger2MarkupConverter supports the Swagger 1.2 and 2.0 specification. 
 
 #### JavaScript
 - [swagger-ajax-client](https://github.com/signalfx/swagger-ajax-client) - Swagger client to communicate with a Swagger server using XHR requests from browsers. Includes client-side validation of requests against the given Swagger spec.