Refactor sb-admin.js code

According the jQuery documentation, “[m]ultiple event types can be bound at
once by including each one separated by a space”.

Reference: http://api.jquery.com/bind/#multiple-events.
Fixed a few typos
Merge pull request #35 from dereckson/fix/jsrefactor

Refactor sb-admin.js code
Added 'Grayscale' Template

Added a new template, 'Grayscale,' and made some minor content updates
to the main site.