Randomly place resources on the map.

The code that draws the resources is pretty fragile.  In particular, it
doesn't actually specify that the resources should be drawn above the
map.  Most of the time they show up, but sometimes they don't.
Add a script to install dependencies from yum.
Merge branch 'master' of github.com:kxgames/seacow

Conflicts:
	gui.py
	tokens.py