Merge pull request #1271 from jasonkarns/patch-2

`licenses` field is deprecated

package.json

@@ -40,10 +40,6 @@
     "grunt": "~0.4.0",
     "node-sass": "~0.9.3"
   },
-  "licenses": [
-    {
-      "type": "MIT",
-      "url": "https://github.com/hakimel/reveal.js/blob/master/LICENSE"
-    }
-  ]
+  
+  "license": "MIT"
 }