upgraded postcss, webpack

package.json

@@ -25,7 +25,7 @@
     "gulp-jshint": "1.11.2",
     "gulp-less": "3.0.3",
     "gulp-livereload": "3.8.0",
-    "gulp-postcss": "5.1.10",
+    "gulp-postcss": "6.0.0",
     "gulp-print": "1.1.0",
     "gulp-replace": "0.5.3",
     "gulp-run": "1.6.8",
@@ -39,7 +39,7 @@
     "run-sequence": "1.1.1",
     "streamqueue": "1.1.0",
     "tar.gz": "0.1.1",
-    "webpack": "1.10.1",
-    "webpack-stream": "2.0.0"
+    "webpack": "1.12.0",
+    "webpack-stream": "2.1.0"
   }
 }