Store the room and client in memory

First step to handle multiple, non-conflicting clients connecting to different
rooms.

app.js

@@ -23,14 +23,17 @@ const config = require('./config.json');
 const runner = require('./lib/runner.js')(config.runner);
 const controller = require('./lib/controller.js')('./client');
 
+const registry = {};
+
 console.log('starting hublot...');
 
 controller.loadAll('controller', 'lib', 'robot')
   .then(modules => {
     console.log('modules loaded... launching runner');
-    // Note: result can be stored in a variable to control further the browser
+    const room = 'test-bot';
+    // Note: client can be used to control further the browser
     // e.g.: let client =  runner.run(...); client.end();
-    runner.run(modules, config.visio.url, 'test-bot', config.client);
+    registry[room] = runner.run(modules, config.visio.url, room, config.client);
   })
   .catch(err => {
     console.error(err);