Add keywords inclusion tests

docs/_data/sponsors.json

@@ -228,6 +228,13 @@
       "title": "Sanyo Digital",
       "width":"160",
       "height":"33"
+    },
+    "coupons4printing": {
+      "name": "coupons4printing",
+      "url": "https://www.coupons4printing.com/",
+      "title": "Coupons For Printing",
+      "width":"60",
+      "height":"60"
     }
   },
   "home": [
@@ -250,6 +257,7 @@
     ,"tutlance"
     ,"pillarwm"
     ,"sanyodigital"
+    ,"coupons4printing"
   ],
   "footer": [
     "polygon"