helloWorld.js

var packagejson = {
  "dependencies": {
    "vjs": "git+ssh://git@github.com/vigour-io/vjs#develop"
  }
} 

var Observable = require('vjs/lib/observable')

var list = new Observable()

list.on('$property', function(meta){
  console.log('a property was added or removed!', meta)
})

list.set({
  key: 'value',
  otherkey: {
    blux: true
  }
})