Added CITATION file
Fixed line wrap
Whitespace
Try to fix for Python 2.6.2
Add relevant tests from 1060 and related bug fixes
two more tests from #1060
Define dimensionless_unscaled differently so it can be imported more easily
Remove definition of dimensionless_unscaled from __init__.py
Merge pull request #1401 from astrofrog/citation-file

Add CITATION file to Astropy's root
Merge pull request #1548 from nden/tests-from-1060

tests from 1060
Fix derivatives and add tests
add explanation of dictionary keys
Merge pull request #1534 from nden/model-derivatives

Model derivatives - minor changes and tests
Have separate variables for setup_requires and install_requires.
Assigning a quantity to a table column sets the unit on the column correctly
Added an example to the documentation
Removed unnecessary import
Added CHANGES.rst entry
Added scalar quantity test
Fixed API links