Compressed imagery

Using ImageOptim for Mac
Added humans.txt
Further image compression
Front-end changes: -bootstrap, +html5, -css_browser_selector

Removed bootstrap from core CSS.
Added properties to scaleconf2013.css that were being used in
bootstrap.css
Moved to an HTML5 doctype.
Fixed malformed HTML in page.html
Moved the GA script to the bottom of the page.
Added Russel and Stefano to humans.txt
Local webfonts, HTTP request reductions, Image reductions

Moving Google Webfonts to local webfonts. Using woff for everyone
except for IE and Android, and eot for IE Android users can fall back
to "Droid Sans".
Resized the Cape Town istock photo on the homepage.
Whitespace fixes
Redirect-free link to LessFuss
Merge pull request #31 from rcloran/master

Use canonical links in page template
HTML5 validation passed
Merge pull request #32 from rcloran/lessfuss-link

Redirect-free link to LessFuss
Mis-spelled CSS class name
small copy changes from Belinda
Merge pull request #33 from smn/master

Small copy change for Praekelt sponsor page.
Merge in Shaun's modifications
Updated key connections information
Google images and sponsor page stub
two images of speakers were not resized in the correct ratio
images for organisers
about page