Screencast of new ES6 features and compare with ES5

@slides from @jam
https://docs.google.com/presentation/d/1jeZbzKT00goAHT9Vk-lSC0vkxtM2fQTn33AyUfWvFMs/pub?start=false&loop=false&delayms=5000&slide=id.gc4349db71_0_63