End day 4

Well, we switch courses back to our original idea today, and man have we come far O.o

I spent a few hours trying to fix pathfinding when it wasn't broken.
Pymike made some good gfx and I made some cruddy ones.
I made a missile tower with cool missile attack
Lots of ui improvements.
Bots now use the pathfinding.
Made units fight when they touch.
Added a random map generator.
Pymike added explosions
Made a highlighter that shows where you can and cannot build towers.
Implemented resources and costs.
Made towers shoot

All in all, out most productive day yet, and the game is actually quite playable now. If we just made the enemies get stronger we'd be all set already :)
Too tired to make a new screenshot... tomorrow :)