Added pye.math
Added tests for pye.math
Added pye.math.prime
Added tests for pye.math.prime
Added is_prime function to pye.math.prime
Added tests for pye.math.prime.is_prime
Fixed PEP8 errors in __init__.py files
Added a script (bash, sorry Windows folk, but you're on your own.) to run tests.
Added pep8 test, made tests/math a module so that silly nosetests would find it.