#46 support for delayed security events in controller
- new security breach enum
- one rule so far uses that
- added test cases for all delayed processing of events and different
  rules
- rules are dropped after the delay and potential breach raised if still
  valid
- minor field added to security event, only used when processing delayed
  events and set to minor at that point - to be used later by security
  handlers that do not need to do anything for minor events