opa city slider

:older_man: :city_sunset:  opa city slider

PROBLEM
=========
People want opacity sliders.

TODO
-----
- [x] Get click to not listen to sliders..
- [x] Have people stop worrying
- [x] stop worrying myself
- [x] cry :cry: 
en kan dit niet gewoon this.options.opacity? Mijn linter vindt dit niet goed