remove all of chipmunk leftovers, yamlcpp, various physics classes

and other code related to it. lots cleaner now, and simpler. and works
better in general.

also required me to remove a statement in spatial hash that used cpBB.
replaced it with just a custom statement, also resulted in me using
the test spatial hash unit test, which i found a bug in the output.
(where it looked like it was saying something failed when it didn't, it
was just outputting the obj count wrong).