Create a proper logo for the VIND project

[tkurz]

There is a need for a proper VIND CI for presentations, publications, etc. Especially we would need:

• a good looking logo (maybe in different sizes, degrees of complexity)
• some consistent color scheme
• a consistent spelling (vind, VIND, ViND, etc.. there are some more ;)

As I am not known for creating good looking logos, I am looking forward for contributions ;)