title: Generate Yaml or Json file from Swagger documentation
body: <p>I have developpe some Rest web service documented by swagger, using swagger-springmvc annotions. 
  Now, I want to use swagger-editor to generate client side Rest web service code, but swagger-editor require Yaml or Json file. Do you know if there is a way to generate this file ? 
  Thanks at advance</p>
  
  <p><strong>EDIT :</strong>
  It's can be done by using swagger-mvn-plugin , but I don't found an example on how to do it ?</p>