Add "Configuration" section to documentation

[gavv]

Pages:

• [ ] Concept of URIs, endpoints, slots/interfaces/protocols, connecting, binding, table of protocols
• [ ] Improving latency (#255) (latency tuner backends & profiles, resampler backends, packet & frame lengths, FEC, target & io latency)
• [ ] Improving service quality (FEC schemes, FEC block size & ratio, interleaving)
• [ ] Improving performance (#299) (resampler, FEC)
• [ ] Advanced setup (sender-side latency tuning)
• [ ] Multicast and broadcast (#308)
• [ ] Multiroom (synchronous playback)
• [ ] Audio devices (encodings, surround, multi-track, auto-pause)

[KishkinJ10]

can i work on this ? Where can i start ?