Add - Docker Flow Proxy

[Vad1mo]

Hi,

I would like to add a link.

REPO:
https://github.com/vfarcic/docker-flow-proxy

DESCRIPTION:
Docker Flow Proxy, Easy way to reconfigure proxy every time a new service is deployed, or when a service is scaled. HAProxy based. Works with Swarm out of the box.

AUTHOR:
https://github.com/vfarcic

Or directly write it:

[Docker Flow Proxy](https://github.com/vfarcic/docker-flow-proxy) - Easy way to reconfigure proxy every time a new service is deployed, or when a service is scaled. HAProxy based. Works with Swarm out of the box. By [@vfarcic](https://github.com/vfarcic)

[vegasbrianc]

Thanks @Vad1mo Created PR #480 for docker-flow-proxy