[WIP] Random, star-shaped polygons

[WalzerMelodica]

Hello David, now I hope I'm in the right place :)

[noinia]

I'm not David, but I think you're good to start implementing stuff now ;). You may want to give this pull request a useful name to that end :).

[lemmih]

Yes, this is perfect! I'll add type-signatures and an explanation of the random star-shaped polygon algorithm.

[lemmih]

If you want to do something other than star-shaped polygons then we can still use this draft PR.

[lemmih]

Hi @WalzerMelodica. I pushed a new module with a description of the problem and a list of functions that can help you solve it. Run git pull and then look at hgeometry/src/Data/Geometry/Polygon/Star.hs.