slog-rs: Structured, composable logging for Rust

After using https://github.com/inconshreveable/log15 for Go, I become sold on structured logging (read more http://gregoryszorc.com/blog/category/logging/ and https://kartar.net/2015/12/structured-logging/).

I've decided that Rust must have a strong structured logging solution, and so I present: slog-rs. I believe it reached a level of usability justifying sharing with a wider audience.

See slog-rs features: https://github.com/dpc/slog-rs#features

Happy logging!