* Add dnstap as another input format (read from unix sockets)
* Add optional filling of ASN and Country Code fields in exported data
  based on client's IP address using MaxMind's GeoIP databases.
* Use new implementation specific fields from C-DNS 0.5.0 library (asn,
  country-code, round-trip-time)
* Improve TCP RTT millisecond estimates by rounding up values >= .5
* Add fstrm, Protocol Buffers and libmaxminddb as dependencies
* Add Dockerfile