Copied over latest changes from affiliated package template
Added back optional dependencies to .travis.yml
Change scipy import to numpy
Merge pull request #65 from cdeil/scipy

Change scipy import to numpy
Ensure that optional dependencies for Sphinx are installed
Removed asciitable from .travis.yml
Merge pull request #64 from astrofrog/update-from-template-3

Copied over latest changes from affiliated package template
Use astropy.coords in nrao package
remove unused import
remove unused imports
Remove unused packages from sphinx mock module list
add to .gitignore