QUANTUM-1 Add run_tests.py to run unittests.

While I try and figure out a nice framework to use,
I'm going to hack together a simple one with python.

Still need to get quantum.js to finish compiling, and then
I need unit tests for it.

https://github.com/cwgreene/quantum/issues/1
QUANTUM-1 Ignore build directory.

https://github.com/cwgreene/quantum/issues/1
QUANTUM-1 All 'tests' are currently 'passing'.

Which basically means no syntax errors and no unbound
references. Well, and everything terminates, so there is that.
Need to look into code coverage testing for javascript.

https://github.com/cwgreene/quantum/issues/1