base: Distribute mustache and bring it into base package

This is a simple templating library that fits quite well with jQuery
and our method of operation. We don't currently do incremental DOM
updates, but that will come in a later iteration.

Reviewed-by: Marius Vollmer <marius.vollmer@redhat.com>
 * Added license text
shell: Use Mustache to render the Servers on the dashboard

Note that we can't use .data() with data-* attributes as these
may change underneath jQuery.

Closes #1566
Reviewed-by: Marius Vollmer <marius.vollmer@redhat.com>
 * Adapt tests