add screenshots to readme

[Schrank]

We should add a few screeenshots and a short user guide, so everyone sees on the first view, what this extension is like and how to use it.

[bastianccm]

Absolutely. As soon as it has been rewritten ;)

The code is outdated and old, I think it calls for a complete rewrite?

[ivansuharyadi]

it will be nice module if can run on magento 2 :)

[jglauche]

the screenshots on the README are all 404'ing