Added .gitignore
Fixes to conform to latest version of spectral-cube
Added first set of tests for noise.py
Bug fixes; need moar testing
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
Merge pull request #17 from low-sky/master

Merge of dev work