copying main.css to main.less
migrate main.css to main.less, add plugin to compile it.
Upgrade to bootstrap from 2.1.0 to 2.3.1. Fixes display bug for accordion in IE.
Updates README with details about new frameworks and tools we're using.
Upgrade jquery from 1.8.0 to 1.8.3
Update main.css for the developers that haven't installed lessc.
Git ignore .swp files.
Minor tweaks to tutorial content for asthetics.
Tweak the layout of the Tutorial title and move the TOC around a little bit.