Add Images not lazyloaded rule

lib/metadata/policies.js

@@ -910,6 +910,15 @@ var policies = {
         "isAbnormalThreshold": 50,
         "hasOffenders": true
     },
+    "lazyLoadableImagesBelowTheFold": {
+        "tool": "phantomas",
+        "label": "Not lazyloaded images",
+        "message": "<p>This is the number of images displayed below the fold that could be lazy-loaded. This is an excellent way to accelerate the loading time of an heavy page.</p><p>I recommend using <a href=\"https://github.com/vvo/lazyload\" target=\"_blank\">this lazyloader</a>.</p>",
+        "isOkThreshold": 1,
+        "isBadThreshold": 12,
+        "isAbnormalThreshold": 30,
+        "hasOffenders": true
+    },
     "notFound": {
         "tool": "phantomas",
         "label": "404 not found",

lib/metadata/scoreProfileGeneric.json

@@ -85,7 +85,8 @@
                 "domains": 3,
                 "notFound": 3,
                 "multipleRequests": 2,
-                "smallRequests": 1
+                "smallRequests": 1,
+                "lazyLoadableImagesBelowTheFold": 2
             }
         },
         "serverConfig": {