Disable source comments

Require latest grunt-sass, bumped dep

Gruntfile.js

@@ -152,6 +152,7 @@ module.exports = function (grunt) {
       options: {
         includePaths: ['scss'],
         precision: 6,
+        sourceComments: false,
         sourceMap: true
       },
       core: {

package.json

@@ -52,7 +52,7 @@
     "grunt-html-validation": "~0.1.18",
     "grunt-jekyll": "~0.4.2",
     "grunt-jscs": "~1.0.0",
-    "grunt-sass": "~0.16.0",
+    "grunt-sass": "~0.17.0",
     "grunt-saucelabs": "~8.3.3",
     "grunt-sed": "~0.1.1",
     "load-grunt-tasks": "~1.0.0",