Add "Edit this Code" feature

[karimlakhani]

As a developer, the most useful thing for me are code samples. Being able to quickly tinker with these code samples helps a ton. So I would like the ability to export the code samples in the Dojo documentation to a JSFiddle or JSBin or CodePen IO.

Eventually I would also like a directory of working Dojo code samples. I think this will help people who are new or unfamiliar with Dojo a lot.

See:

Display a Fiddle from POST: http://doc.jsfiddle.net/api/post.html

AngularJS JSFiddle Examples: https://github.com/angular/angular.js/wiki/JsFiddle-Examples

[kitsonk]

Put this here for now as a reminder: http://doc.jsfiddle.net/api/post.html