updated readme for 0.5.0 release
updated readme for 0.5.0 release

sunitparekh/data-anonymization,justinwiley/data-anonymization,paulhendricks/data-anonymization,yanismydj/data-anonymization,paulhendricks/data-anonymization,sunitparekh/data-anonymization,justinwiley/data-anonymization,yanismydj/data-anonymization