Added test case with a retina image. Does not actually assert anything yet.
jshint
Make packingData available later in the spriting chain
Update -sprite-selector-for-group background-size property if it exists. When switching to a sprite sheet it changes
Handle background-size css property in each of the cssRules that point to a sprite. Apply device pixel ratio if needed
Upgrade assetgraph to 1.15.0
Try to improve transform readability
Fix invalid function call
Improve retina sprite test case to actually test something
Background offsets seem to be relative to the background-size, so divide by the devicePixelRatio when setting
Make linter happier
Fix original 2x test to make sure it follows the expected convention
Add a minimum padding on any sprite with a device pixel ratio over 1. Ensures that rounding errors in background-position don't cause other sprites bleeding into high dpr sprites because of background size division ending up on non-whole pixel offsets
Add test case with retina sprites in inline styles
Upgrade assegraph to 1.15.1
Upgrade canvas to 1.1.6
Merge pull request #13 from assetgraph/retina

Handle background-size on sprite images