Bump recommended version for Etherpad to 1.4.0
Bump recommended version for Etherpad to 1.4.0

Orodan/Hilary,Orodan/Hilary,mrvisser/Hilary,jfederico/Hilary,timdegroote/Hilary,nicolaasmatthijs/Hilary,simong/Hilary,jfederico/Hilary,nicolaasmatthijs/Hilary,stuartf/Hilary,stuartf/Hilary,timdegroote/Hilary,mrvisser/Hilary,ExC0d3/Hilary,simong/Hilary,ExC0d3/Hilary