Update docs to include README
Allow wide tables in RTD
Bring protocol up to date

Recent versions of picamera include the ability to read AWB gains, and
exposure speed. Enhance the compoundpi protocol to add these
capabilities.
Fix #14
Fix #16

Pushed default to 15 seconds to accomodate anyone using long exposure
times (which require considerably more delay when capturing)
Fix #21

Added SO_REUSEADDR to all socket servers (haven't encountered this yet
on the compound pi server, but it can't hurt to add it)
Fix #22