Gaya/Retina-Sprites-for-Compass — pull request #14 by hank7444 (2014-12-12 14:54:54+00:00)
Title: _retina-sprites.scss  performance improvement

the sprite image are remove - rebuild many times also,

it waste a huge performance and sometimes cause sass building css failed.
I use @import to switch the sprite-map() function, now it's good to work:)

it only check sprite image one time after I saved file :)