This basically hooks up the game so it starts to get to the point where
we can play test it. We now have a Wave Generator, generating waves, but
we need to move the enemies now. I also set it up so we can start to show
hints in the hints UI.

The first 10 levels have been designed.

I've added overall styling for the entire board so it looks good.
Merge branch 'master' of https://github.com/iegamejams/shiftgame into DigiTec