More implementation of astropy.units
Make sure units are properly written and read from convolved flux files
Finish converting ConvolvedFluxes to use astropy.units
Work in progress: implementing unit support in sedfitter.models
Fix dimensions
More integration with astropy.units
Refactor Extinction to use astropy.units
Updated installation instructions
Moved checking of physical type to validator
Fix code for Python 3.x
Use astropy 0.3 wheel for Travis
Use exact versions for Travis
Merge pull request #8 from astrofrog/more-units

More implementation of astropy.units