added accuracy calculations
Update from master
Merge pull request #28 from OpenSourcePolicyCenter/master

updating accuracy testing branch
added mockup of testing code
fixed whitespace and moved imports up
Merge branch 'master' of https://github.com/OpenSourcePolicyCenter/Tax-Calculator into accuracy-test
reworked accuracy with use of HDF5 for SAS file
made output play nicer with pandas
redid fix to CapGains calculation
accuracy fxns now better reflect testing process
setting more E-codes to P-codes from PUF
removed write-out duplicates and added more vars to be written out
PEP8 fixes
refactor functions to return DataFrames

- adds to_csv function to output DataFrame with consistent formatting
- all calls to np.savetxt changed to return DataFrames for better
  reusability
Merge pull request #40 from talumbau/df_refactor

Refactor functions into DataFrames
made mis_matching records more usable
changed report_accuracy signature to be more usable
updated c19700 calculation
changed _compitem calculation
updated _addamt calculation