Renderer API Plugin definition discussion

[ifraixedes]

Please read the README and anything that you would like to discuss about the Renderer API Plugin post a commend here.

[ifraixedes]

if nobody has objections, @gajjargaurav could go ahead and make the changes in his module gitup-mailer-renderer-swig to adapt the current renderer API proposed and close this issue approving the API for the first release

[ifraixedes]

@gajjargaurav first version of plugin, v0.x implementation is implemented, however I have to implement the test, which I would do as soon as I get more free time to work on it. Take a look to the README in that branch because a changed the renderer API for reason that I found through the implementation.