Add the Bunsen Save menus to Beaker.
Vendor bower_components.
Disable groovy, iruby, julia, and R.
Revert "make core server only listen on 127.0.0.1"

This reverts commit e3a35b9d9ea42d8d23306da29682e0d459befe07.
Fix case on filename references.

This case mismatch wouldn't cause errors on desktop  Windows/Mac,
but it's a problem when the filesystem cares about case
(e.g. Bunsen's filesystem).