Release 0.6.6 changes

[martinholmer]

I'm having trouble remembering my contributions from one release to another, so I'm opening an issue that I can add to as I work and hopefully others will add to it as their contributions are merged into the master branch.

The last commit included in release 0.6.5 was #820.

[martinholmer]

Since release 0.6.5 [#820] I have committed the following enhancements to Tax-Calculator:

Revise code to use smaller puf.csv input file and make changes to create that input file
Remove debugging variables from functions.py reducing execution time by 42 percent [#833]
Add comments to show one way to use Python debugger to trace Tax-Calculator code [#835]
Add tests that confirm zeroing-out CALCULATED_VARS at start leaves results unchanged [#837]
Make 2013-2016 medical deduction threshold for elderly be 7.5% of AGI (not 10%) [#839]
Fix typo so that two ways of limiting itemized deductions produce the same results [#842]
Revise logic used to estimate behavioral responses to policy reforms [#846, #854, #857]

[MattHJensen]

Revise logic used to estimate behavioral responses to policy reforms [#846, #854, #857]

@talumbau, because of this change, we need a new version of TC on TB soon. Would you like to finish work on #844 first?

@talumbau and @zrisher, do you think any of your work since #820 should be included in the changelog?

[talumbau]

@MattHJensen I pinged appropriate parties on #844. Yes, I would like to get it merged before releasing new version. Also, I looked at any of my commits that got merged in after #820. The main thing was just some fixes when running w/o numba. Probably not worth including in release notes.

[MattHJensen]

Ok. Thanks. I think #844 is good to go, too. I did leave a few comments on the PR, but I don't think they need to hold it up.

[MattHJensen]

Closing and opening an issue for our next release, 0.6.7. Congrats everyone on the new release and thanks @martinholmer for all of the improvements in this one.

[MattHJensen]

Here is a link to the release notes. https://github.com/open-source-economics/Tax-Calculator/releases/tag/0.6.6