updated readme for issues per page argument
updated readme for issues per page argument

jeffwilcox/octonode,dhinus/octonode,zzo/octonode,pksunkara/octonode,dkfiresky/octonode,silverbux/octonode2,bhanuc/octonode,valedaemon/octonode,cassioscabral/octonode,varung-optimus/octonode,MattCopenhaver/octonode,gigster-eng/octonode,gitignorance/octonode,classeur/octonode