Fix adobe#589: changed autoprefixer-core to autoprefixer for new vers…

…ion and updated postcss version

package.json

@@ -14,7 +14,7 @@
   },
   "dependencies": {
     "anymatch": "1.3.0",
-    "autoprefixer-core": "5.1.8",
+    "autoprefixer": "^6.0.0",
     "aws-sdk": "^2.19.0",
     "chokidar": "1.6.0",
     "glob": "7.0.6",
@@ -39,7 +39,7 @@
     "grunt-jasmine-node": "0.1.0",
     "grunt-lib-phantomjs": "0.3.0",
     "grunt-npm": "git://github.com/sedge/grunt-npm.git#branchcheck",
-    "grunt-postcss": "0.3.0",
+    "grunt-postcss": "^0.8.0",
     "grunt-shell": "^2.1.0",
     "grunt-targethtml": "0.2.6",
     "grunt-template-jasmine-requirejs": "0.1.0",