Feature/cruft cleanup

This PR is about cleaning and reorganizing cruft that has accumulated in the HTML templates, js, and css directories. In particular:

* Removed bootstrap and deprecated js files.
* Reorganized the js directory and updated the requirejs config and dependency references.
* Added local copies of third party libraries, mostly jquery plugins for better dev experience.
* Added README to js dir to outline the expected structure.
* Added a comment in the base template about `$.fn.appendAround` since future me will probably forget.

@jazahn review?