Merge branch 'emv-checks'

* emv-checks:
  Implement basic transaction log for EMV Terminal Risk Management
  Implement random transaction selection for EMV Terminal Risk Management
  Update to latest OpenEMV common crypto submodule
  Implement initial EMV Terminal Risk Management
  Implement helper functions for GET DATA in TTL and TAL
  Stringify various EMV fields
  Implement EMV Processing Restrictions
  Fix EMV date and time strings
  Implement --txn-date and --txn-time options for emv-tool

Author: leonlynch