README: update design
README: update design

stliu/node-xmpp,node-xmpp/node-xmpp,qbit/node-xmpp,eelcocramer/node-xmpp,qbit/node-xmpp,agebrock/node-xmpp,xmppjs/xmpp.js,WeBest/node-xmpp,node-xmpp/node-xmpp,node-xmpp/ltx,agebrock/node-xmpp,ggozad/node-xmpp,samuelagm/ltx,xmppjs/xmpp.js,bentaber/ltx,fritx/ltx,tempbottle/node-xmpp,swissmanu/ltx,fritx/ltx,ggozad/node-xmpp