Prometheus Announcer v1.0.0

Some tools to enable applications, or nodes to announce themselves to prometheus using prometheus http service discovery.

The tools include:

• A Server that listens for announcements on grpc and (optionally) REST, then provides a http_sd endpoint for Prometheus to scrape.
• A Client that announces targets over grpc with target and labels provided on the command line.
• A Golang Module for implementing the client functionality in your own projects.