Plugin extension for correlating traffic before and after NAT translation.
Requirements 
  - Redis cache for storing and retrieving hashes
  - Flowmon probe with API
  - libnf library for merging netflow files
  - LPM library for fast IP address lookup

The plugin is in alfa-stage - it is a proof of concept that the probe can
be used for the correlating of NAT traffic. For further information, please
contact the author directly - igregr@fit.vutbr.cz
