Upgrade Bootstrap to 3.2.0; FontAwesome to 4.1.0

### Notes

* I'm loading Bootstrap and FontAwesome off of their recommended CDNs. If you'd prefer local copies of those, let me know and I'm happy to update that.

* Since a larger redesign is planned, I didn't worry about 100% matching all of the visual styles. Everything should be close to the existing version, but things are subtly different in some spots. Part of that is the new version of Bootstrap, part of it is me cleaning some stuff up. 

* I'd like to revise and clean up the existing CSS (and consider moving to SCSS or LESS as a pre-processor), but I'll tackle that in a separate PR.