travis installs spectral_cube now
Merge pull request #17 from keflavich/spectralcubeinstall

travis installs spectral_cube now
Added initial files for docs
Added RTD requirements file, and added Sphinx extensions to docs/conf.py
Placeholder text on front page and API page.
Added spectral_cube to RTD pip requirements
Fix typo in git URL
Added initial tests (no accuracy tests yet)
Changed radio-tools to radio-astro-tools
Fixed Python 3 failure
Merge pull request #23 from astrofrog/more-tests

Added initial tests (no accuracy tests yet)
Added autosummary templates
Implemented initial accuracy tests and fixed bugs
Make respect_nan work for all modes
Merge pull request #25 from astrofrog/accuracy-tests

Initial accuracy tests and bug fixes
Tentative fix for issue #22: remove the width argument from the functions extract_poly_slice() and extract_pv_slice().

I have updated the example notebook as well, but this needs to be tested.
Merge pull request #27 from bluescarni/bugfix-for-issue-22

Tentative fix for issue #22: remove the width argument from the function...
First draft of docs
Import WCSPath into top-level namespace for API docs
Merge Path and WCSPath