Commit before migrating testing framework from behave to py.test
Refactored DimensionsImporter to use py.test
Refacotred CalculationsCoordinator test suite to py.test
Modified migration script to just add new surveys without needing to add all of them
Added untested status update so that it doesn't print number of rows written starting at 0 (which can be misleading)
Added sample size for categorical questions so small repsonses are removed for confidential questions