PT-586 - Added documentation and removed unused templates and related JavaScript.

 	modified:   js/theme.js                    <-- remove unused javascript
 	deleted:    templates/embed.tpl.php        <-- cruft
 	deleted:    templates/html--embed.tpl.php  <-- cruft
 	modified:   templates/node--chart.tpl.php  <-- added documentation
 	deleted:    templates/page--embed.tpl.php  <-- cruft