0.6.4: Merge pull request #794 from talumbau/read_csv_egg

• Test TaxBrain handling of delayed reforms
• Move cmbtp calculation and earnings splitting logic from Records class to puf.csv file preparation
• Revise Behavior class logic
• Add unit tests to increase code coverage to 98 percent.
• Create Consumption class used to compute "effective" marginal tax rates
• Update Numpy and Pandas dependencies to latest versions to avoid a bug in the Windows conda package for Pandas 0.16.2, see this issue.
• Add scripts to version and release.

0.6.3: Merge pull request #727 from open-source-economics/minimal->minimum

• Add --records option to simtax.py
• Add --csvdump option to inctax.py
• Add three d samples to Tax-Calculator versus Internet-TAXSIM comparisons
• Add first set of Tax-Calculator versus TaxBrain comparisons
• Document first set of Tax-Calculator versus taxcalc.sas comparisons
• Add data and logic to implement EITC age-eligibility rules
• Fix Child Care Expense logic
• Exclude dependents from EITC eligibility
• Update and fix 10_minutes_to_Tax-Calculator.ipynb
• Update files in taxcalc/comparison

0.6.2: Merge pull request #649 from martinholmer/master

Revise reforms.py to trap params not used by TaxBrain and add make_reforms.py script