fixed typo in features README.md
fixed typo in features README.md

part of pivotal tracker story https://www.pivotaltracker.com/story/show/76232594
fixed typo accept_confirms to dismiss_confirms for unhappy path example

razorcd/osra,guangfanxu/osra,SergiosLen/osra,PurityControl/osra,NikitaAvvakumov/osra,razorcd/osra,AgileVentures/osra,ZmagoD/osra,gmunumel/osra,guangfanxu/osra,b264/osra,NikitaAvvakumov/osra,PurityControl/osra,ZmagoD/osra,guangfanxu/osra,AgileVentures/osra,evo2013/osra,robbiejackson/osra,jmorcate/osra,NikitaAvvakumov/osra,motasem-salem/osra,robbiejackson/osra,SergiosLen/osra,jmorcate/osra,ZmagoD/osra,motasem-salem/osra,b264/osra,jmorcate/osra,PurityControl/osra,robbiejackson/osra,razorcd/osra,SergiosLen/osra,AgileVentures/osra,gmunumel/osra,motasem-salem/osra,b264/osra,evo2013/osra,gmunumel/osra