Made test planes show up where clicks occur.

This code is really bad in parts. I don't think some parts of it will be
needed in the future (the contentmanager should be removed from
windmanager later), but it works for now.
Collisions now displayed for all rays in path.

The update slows down a LOT if too many collision markers are placed. But
who cares? They all show up. Still scary bits of code though.