def add_record(tag, original, replacement)
      @dictionary[tag] = Hash.new unless @dictionary.key?(tag)
      @dictionary[tag][original] = replacement
    end
def add_record(tag, original, replacement)
      @dictionary[tag] = Hash.new unless @dictionary.key?(tag)
      @dictionary[tag][original] = replacement
    end
Creates a new AuditTrail instance.

 Adds a tag record to the log.

 @param [String] tag the tag string (e.q. '0010,0010')
 @param [String, Integer, Float] original the original value (e.q. 'John Doe')
 @param [String, Integer, Float] replacement the replacement value (e.q. 'Patient1')