Feature/yaml builder

I created a view that allows the creation of a YAML badge file via an HTML5 form.
-    It updates in real-time via JavaScript.
-    The criteria section is not fleshed out yet (the form area for that will be more complex).
-    There is currently no functionality for generating the file without JavaScript, nor can you yet download the preview textarea content as a text ``.yaml`` file.

Formatting suggestions? Ideas? Thoughts? How's it look? Feel free to commit tweaks before we merge it in.