Merge pull request #12 from low-sky/master

Cleanup for noise methods.
Noise cleanup
debugging - not there yet
Noise debugging.
cleanup
cleanup
Merge branch 'master' of github.com:radio-astro-tools/signal-id

Conflicts:
	noise.py
	test/test_noise.py
Merge branch 'master' of github.com:low-sky/signal-id

Conflicts:
	noise.py