start adding firebase

config.json.example

@@ -69,5 +69,9 @@
           "KEY": "key.pem",
           "CERT": "cert.pem"
         }
+    },
+    "FIREBASE": {
+        "APP": "app-name",
+        "SECRET": "secret"
     }
 }

package.json

@@ -18,6 +18,7 @@
     "domain-middleware": "~0.1.0",
     "express": "~3.17.5",
     "express-csv": "~0.6.0",
+    "firebase": "^2.2.9",
     "grunt": "~0.4.1",
     "grunt-browserify": "^3.3.0",
     "grunt-cli": "~0.1.9",

website/src/models/group.js

@@ -6,6 +6,8 @@ var async = require('async');
 var logging = require('../logging');
 var Challenge = require('./../models/challenge').model;
 
+// NOTE any change to groups' members in MongoDB will have to be run through the API
+// changes made directly to the db will cause Firebase to get out of sync
 var GroupSchema = new Schema({
   _id: {type: String, 'default': shared.uuid},
   name: String,