Use conda for .travis.yml
Fix coverage testing
Added status badges
Merge pull request #57 from astrofrog/use-conda

Switch .travis.yml to use conda
Remove dependency on six and enable sphinx tests on Python 3
Added sphinx build test and make it pass on Python 3
Implement @mdboom’s suggestion
Copy instead of symlink
Avoid warning due to matplotlib not being installed
Change encoding
Fix for Python 3.2
Fix issue with getting matplotlib intersphinx file