Finished Carousel & Calendar, updated bootstrap

Changes:
 - updated bootstrap to v3.0 (from v2.3.2).  Needed to change some navbar
   tags as well as `span` to `col-log-x`, and other minor changes.
 - Finished Carousel feature.  Need to add more content
 - Finished Calendar.  Now shows up as sidebar in extra pages, and as a
   mini-column underneath the carousel on the main page.