remove obsolete text
add a reference to cosmology subpackage documentation
Add cosmology section to v0.2 What's New
Fix abspath -> realpath in utils.data to avoid issues with symlinks
Merge pull request #697 from mdboom/testing/open-files-testing-in-travis

Turn on open file testing in Travis
Merge pull request #727 from astrofrog/utils/fix-data-path

Fix abspath -> realpath in utils.data to avoid issues with symlinks
Added Python 3.2 testing with optional dependencies to Travis
Remove specialized code for dealing with strings in HDF5 meta-data
Merge pull request #721 from nhmc/WhatsNew_Cosmology0.2

Update Cosmology section for What's New in 0.2
Merge pull request #722 from astrofrog/io/more-hdf5-fixes

Minor HDF5 fixes, and added Python 3.2 optional dependency testing to Travis
Add the scale to the __repr__ of a dimensionless unit.
Add dimensionless support to Unit.physical_type
Add `is_unity` method
Put scale at end, aka Unit('dimensionless with a scale of 1000.0')
Update docs to reflect new __repr__
Remove is_dimensionless
Add tests for is_unity
Remove reference to is_dimensionless in is_unity docstring
Latest round of renaming
Privatize dimensionless constant