Randomising order of users on homepage
Merge pull request #4 from cardiffrb/mjt-randomise-users

Randomising order of users on homepage
Use nicer method for randomising user listing
Add tidier bg pattern
Use pipe in title
Tighten logo spacing
Add clearfix to layout
Add O'Reilly advert
Optimise background image
Oreilly ads
Remove oreilly ads
link to our IRC channel
fix user floating issue
rake task to update twitter avatar URLs