WIP: ES6 and Standard Format

[kedoska]

new devDeps

• babel-plugin-transform-object-rest-spread
• neutrino-preset-standard

Breaking changes

main module exports are now like this

'use strict'
import * as constants from './constants'
import * as engine from './engine'
import presets from './presets'
import * as actions from './actions'
import Game from './game'

export default {
  constants,
  engine,
  presets,
  actions,
  Game
}