WIP: updating markup and styles, removing unnecessary Bootstrap bloat from compiled CSS


![screenshot 2014-01-27 11 14 05](https://f.cloud.github.com/assets/3168960/2008205/8ba88fee-8745-11e3-8293-801ced4ca97b.png)

Still a WIP but ok to merge in if needed. Main changes:

* Refactor of HTML ditching the old <dl>s for more flexible markup
* Addition of fixed top nav with Bootstrap scroll spy jazz
* Addition of some experimental layout styles including basis of timeline stuff style as per http://tympanus.net/Blueprints/VerticalTimeline/
* Experimenting with the use of cursive fonts for the nav and month headings as a nod to our lovely domain name and favourite meme of the moment
* Commented out a bunch of as yet unused mixins in bootstrap.scss to reduce bloat in the compiled, unminified CSS file during development

**Design to-dos:**

- [ ] Decide on palette/overall look & feel and implement core styles in CSS
- [ ] Complete timeline styling
- [ ] Try out Fontello as a substitute for Glyphicons
- [ ] Ensure layout works at responsive breakpoints