Some refactoring.

* Change javascript namespace to lowercase.
* Use wp_localize_script() to hold ajax url, and use the same js variable name as the main namespace to stop polluting the global namespace.
Tighten up how content is handled a bit.

* Include avatars
* Apply core filters to content
* Don't expose private comment data in the ajax api
Only allow comment queries against a specific post id.
Switch to using core's versions of backbone and underscore, and fix up how the showing/hiding of comments works.

Also, wrap code in an iife and pass in dependencies.
Upgrade to bootstrap 3.0.3 and add a basic header and footer.