added rzmq instructions
added rzmq instructions

rgbkrk/IRkernel,elaOnMars/IRkernel,JanSchulz/IRkernel,gdtm86/IRkernel,ibm-et/IRkernel,ChinaQuants/IRkernel,Phobia0ptik/IRkernel,chendaniely/IRkernel,mikecroucher/IRkernel,ibm-et/IRkernel