Allow an importer to be passed to stylesheet_modified_since? so that compass can use it efficiently.
Allow an importer to be passed to stylesheet_modified_since? so that compass can use it efficiently.

tangposmarvin/sass,srawlins/sass,OrenBochman/sass,danielfein/sass,antonifs/sass,nicklima/sass,Ahnita/sass,Anshdesire/sass,Andrey-Pavlov/sass,nicklima/sass,askl56/sass,DanteKaris/sass,Andrey-Pavlov/sass,HugoRLopes/sass,lmetla/sass,jaroot32/sass,saper/sass,Iamronan/sass,hcatlin/sass,tenderlove/sass,Anshdesire/sass,Galactix/sass,dylannnn/sass,antonifs/sass,rammy7219/sass,liquidmetal/sass,liquidmetal/sass,PMArtz92/sass,HugoRLopes/sass,oss-practice/sass,baiyanghese/sass,Iamronan/sass,JuanitoFatas/sass,rammy7219/sass,zaru/sass,srawlins/sass,stewx/sass,xzyfer/sass,Nzaga/sass,tangposmarvin/sass,Industrys/sass,srinivashappy/sass,nickg33/sass,lmetla/sass,askl56/sass,ridixcr/sass,PMArtz92/sass,cmpereirasi/sass,DanteKaris/sass,Nzaga/sass,modulexcite/sass,danielfein/sass,MetaAshley/sass,Industrys/sass,StephanieMak/sass,hcatlin/sass,schneems/sass,saper/sass,StephanieMak/sass,jaroot32/sass,modulexcite/sass,briangonzalez/sass,schneems/sass,nickg33/sass,dylannnn/sass,14113/sass,MetaAshley/sass,srinivashappy/sass,zaru/sass,amitsuroliya/sass,JuanitoFatas/sass,Ahnita/sass,xzyfer/sass,OrenBochman/sass,Galactix/sass,cmpereirasi/sass,chriseppstein/sass,amitsuroliya/sass,ridixcr/sass,stewx/sass