Remove unused image assets
Remove some more unused image assets
Add redrawn and hi-res step icons
Add redrawn information icon
Add Sass mixin for device-pixel-ratio media query
Add CSS rules for hi-res icons
Add hi-res information icon
Move device-pixels import to application.scss
Add hi-res ordered list item icons

Add icons for up to 14 steps.
Change colours to match new greys.
Remove beta logo images
Add hi-dpi icons for high density screens

Also make naming consistent across icons.
Update colours to match new greys in appropriate icons.
Optimise icon assets
Add hi-dpi version of the footer crest

Also update colour to match new greys
Add device pixels mixin
Interpolate variable so it renders as a fraction

Opera only accepts device-pixel-ratio values as fractions
Fix indentation
Merge pull request #156 from alphagov/hires_icons

High res icons & logos for high density screensThanks for removing the old assets - some of them are quite funny :)

Didn't spot any that I believe were still in use.