Fix Sass::Util to play nicely with Ruby 2.1 and ActiveSupport
Fix Sass::Util to play nicely with Ruby 2.1 and ActiveSupport

Just module_function all of our singleton methods rather than trying to strip out all the inherited methods

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