Aermod in own file, passes test.

Aermod works inside loop. I found the bug, so I'm putting this on hold.

I guess I'm not putting it on hold

Aermod and skeleton of wrapper should be functional.

Aermod.py can now run on local machine.
Implement grown-up unit testing.
Begin serious unit testing

Testing is functional!

Fixes to aermod made while setting up tests.
Add aermod source and makefile stuff to repo.