Create Example code for V2 as like v1

[skwebs]

As your V1 example codes help beginners to understand the code and create their project. So I request same way create V2 example code on GitHub so beginners can use these code in their project.

[fengyuanchen]

There are many simple examples in the API documentation, e.g.: https://fengyuanchen.github.io/cropperjs/v2/api/cropper-selection.html#examples