Simplify the use of wheels for Travis following @Cadair's method
Fix syntax error
setuptools needs to be upgraded
Use inequality for Cython version since wheelhouse has 0.19.1 and we don't mind exactly what version is used as long as it's recent, and fix syntax error for SciPy.
Tidied up comments in .travis.yml
Removed extraneous options that were causing issues
Require more recent version of matplotlib, since the available wheel file is 1.3.0
Ensure equivalencies are copied over in conversions
Added back -q for most packages
Merge pull request #1355 from astrofrog/updated-wheels-method

Simplify the use of wheels for Travis
Merge pull request #1356 from mhvk/units-quantity-keep-equivalencies

Ensure equivalencies are copied over in conversions