[Sass] Support the proprietary MS filter property syntax.
[Sass] Support the proprietary MS filter property syntax.

PMArtz92/sass,antonifs/sass,HugoRLopes/sass,OrenBochman/sass,chriseppstein/haml,PMArtz92/sass,ridixcr/sass,14113/sass,keithpitty/haml,liquidmetal/sass,xzyfer/sass,baiyanghese/sass,modulexcite/sass,briangonzalez/sass,nicklima/sass,StephanieMak/sass,Anshdesire/sass,DanteKaris/sass,stanhu/haml,lmetla/sass,stanhu/haml,Nzaga/sass,danielfein/sass,ridixcr/sass,tangposmarvin/sass,schneems/sass,dg1dd1ngs/haml,Andrey-Pavlov/sass,MetaAshley/sass,Galactix/sass,Andrey-Pavlov/sass,stewx/sass,haml/haml,nazar-pc/haml,xzyfer/sass,Galactix/sass,Ahnita/sass,Industrys/sass,cmpereirasi/sass,amitsuroliya/sass,srawlins/sass,StephanieMak/sass,chriseppstein/sass,OrenBochman/sass,amatsuda/haml,Iamronan/sass,Anshdesire/sass,jaroot32/sass,askl56/sass,macressler/haml,askl56/sass,zaru/sass,Iamronan/sass,saper/sass,concord-consortium/haml,JuanitoFatas/sass,nickg33/sass,amitsuroliya/sass,sideci-sample/sideci-sample-haml,modulexcite/sass,srawlins/sass,danielfein/sass,Nzaga/sass,oss-practice/sass,DanteKaris/sass,chriseppstein/haml,JuanitoFatas/sass,Industrys/sass,zaru/sass,jaroot32/sass,nazar-pc/haml,tangposmarvin/haml,nicklima/sass,saper/sass,hcatlin/sass,srinivashappy/sass,liquidmetal/sass,srinivashappy/sass,macressler/haml,dg1dd1ngs/haml,dylannnn/sass,HugoRLopes/sass,MetaAshley/sass,rammy7219/sass,lmetla/sass,tangposmarvin/haml,dylannnn/sass,keithpitty/haml,stewx/sass,haml/haml,tenderlove/sass,haml/haml,rammy7219/sass,antonifs/sass,tangposmarvin/sass,schneems/sass,cmpereirasi/sass,hcatlin/sass,Ahnita/sass,nickg33/sass,haml/haml,uniba/hamldoc_ja