numpytest: Added "--test" to specify that only test-classes of the given name will be run.
numpytest: Added "--test" to specify that only test-classes of the given name will be run.

Such as running: python numpytest.py --test=test_gauss

bh107/bohrium,madsbk/bohrium,bh107/bohrium,bh107/bohrium,bh107/bohrium,madsbk/bohrium,madsbk/bohrium,madsbk/bohrium