delegation of sharing added in README
delegation of sharing added in README

**delegating of sharing**: allows a simple pseudo-anonymous mechanism
to delegate publication of event/indicators to another organization.

devnull-/MISP,crruthe/MISP,devnull-/MISP,cristianbell/MISP,RichieB2B/MISP,Rafiot/MISP,Rafiot/MISP,TheDr1ver/MISP,FIRSTdotorg/MISP,cristianbell/MISP,TheDr1ver/MISP,MISP/MISP,MISP/MISP,Rafiot/MISP,FIRSTdotorg/MISP,cristianbell/MISP,FloatingGhost/MISP,FloatingGhost/MISP,cristianbell/MISP,devnull-/MISP,FIRSTdotorg/MISP,FIRSTdotorg/MISP,devnull-/MISP,MISP/MISP,MISP/MISP,crruthe/MISP,RichieB2B/MISP,FloatingGhost/MISP,TheDr1ver/MISP,SteveClement/MISP,crruthe/MISP,FloatingGhost/MISP,crruthe/MISP,SteveClement/MISP,SteveClement/MISP,TheDr1ver/MISP,MISP/MISP,RichieB2B/MISP,Rafiot/MISP,SteveClement/MISP,RichieB2B/MISP,SteveClement/MISP