Implement ES6 features

[bogdaner2]

I think, that`s a good idea to add information about some useful ECMAScript 6 features, such as: template literals/string interpolation, arrow function, modules etc.

[taherabbasm]

yeah that's a great idea, ES6 concepts should be included as mainly arrow function is highly used these days.

[munnokd]

Can you assign this issue to me? I will add this to the root directory.