Fixed an incorrect i18n string reference
Switched curriculum show and edit views to use Bootstrap table styling
Improved curriculum show and edit views' display of course names

If a course in the listing does not have a course name translation
for the current locale, then a name for some other locale is used
instead.
Improved buttons in curriculum edit view

Moved a few buttons to a better location, and improved the styling
of some of the buttons.
Changed curriculums index view content span width from 4 to 8

The listing on the index view requires more horizontal space than
what span4 offers.