silence validator regarding http-equiv="X-UA-Compatible"

Gruntfile.js

@@ -132,7 +132,10 @@ module.exports = function(grunt) {
 
     validation: {
       options: {
-        reset: true
+        reset: true,
+        relaxerror: [
+            "Bad value X-UA-Compatible for attribute http-equiv on element meta."
+        ]
       },
       files: {
         src: ["_gh_pages/**/*.html"]

package.json

@@ -31,7 +31,7 @@
     , "grunt-contrib-qunit": "~0.3.0"
     , "grunt-contrib-uglify": "~0.2.4"
     , "grunt-contrib-watch": "~0.5.3"
-    , "grunt-html-validation": "~0.1.5"
+    , "grunt-html-validation": "~0.1.6"
     , "grunt-jekyll": "~0.4.0"
     , "grunt-recess": "~0.4.0"
   }