Updating to use bower for bootstrap and some fixes.

Resolves #32

Decided to use Bower for loading Bootstrap CSS/JS for admin. Didn't make sense to get files from the BootstrapCDN since it's really used only for the admin area and this way it loads fine and admin is usable if working locally and with no internets.

Also did a fix for the Email settings page which was missing some closing `</div>`s and thus the page was breaking visually.

@angaither 

CC: @barryclark @DFurnes