Introduce debug instead of console.log

package.json

@@ -10,12 +10,13 @@
   },
   "main": "./lib/yellowlabtools.js",
   "dependencies": {
-    "phantomas": "1.7.0",
-    "express": "~4.10.1",
     "async": "~0.9.0",
-    "socket.io": "~1.2.0",
     "body-parser": "~1.9.2",
-    "compression": "~1.2.0"
+    "compression": "~1.2.0",
+    "debug": "^2.1.0",
+    "express": "~4.10.1",
+    "phantomas": "1.7.0",
+    "socket.io": "~1.2.0"
   },
   "devDependencies": {
     "chai": "^1.9.2",