message: Add Google Cloud Messaging (GCM) to the graveyard. CLose
diff: "link": "https://en.wikipedia.org/wiki/Word_Lens",
  "name": "Word Lens",
  "type": "app"
  + },
  + {
  + "dateClose": "2019-05-29",
  + "dateOpen": "2012-06-27",
  + "description": "Google Cloud Messaging (GCM) was a notification service that enabled developers to send messages between servers and client apps running on Android or Chrome.",
  + "link": "https://en.wikipedia.org/wiki/Google_Cloud_Messaging",
  + "name": "Google Cloud Messaging (GCM)",
  + "type": "service"
  }
  ]
  