GoBGP support for FastNetMon merged

Hello, folks!

I have merged GoBGP support for FastNetMon. If you are not familiar with it, please check this link.

It do not build by default because it has huge list of dependencies.

In compare with ExaBGP it’s:
1) Faster
2) Has pretty bundled CLI interface
3) Simple integration with C++
4) Fast install, no external deps (golang powered)

We support only IPv4 unicast now but looking for flow spec support too.

Huge thanks to GoBGP team for help with project 🙂