Does DataFrame need a logo? :)

Now the library is nearing 1.0, people might be looking for something recognizable,
something visual, and something clear.

Creating a logo for DataFrame might help with that!
Exposed has one, Kotlin Notebook has one, 

It will help when choosing a logo for an IntelliJ plugin, if we make one,
and, as a bonus, we will also have some stickers to give away at conferences ;)