update readme to follow new rdoc heading usage
update readme to follow new rdoc heading usage

criticaljuncture/cookbooks,NewSpring/Cookbooks,NewSpring/Cookbooks,beni55/cookbooks,gravitystorm/cookbooks,criticaljuncture/cookbooks,sgerrand/cookbooks,beni55/cookbooks,dbroeglin/cookbooks,dagolden/opscode-cookbooks,DataDog/opscode-cookbooks,beni55/cookbooks,dagolden/opscode-cookbooks,akitaonrails/cookbooks,DataDog/opscode-cookbooks,pgroudas/cookbooks,rightscale/cookbooks,pgroudas/cookbooks,pgroudas/cookbooks,akitaonrails/cookbooks,akitaonrails/cookbooks,sgerrand/cookbooks,danielsdeleo/cookbooks,akitaonrails/cookbooks,pcreux/cookbooks,pcreux/cookbooks,NewSpring/Cookbooks,dbroeglin/cookbooks,beni55/cookbooks,akitaonrails/cookbooks,rightscale/cookbooks,gravitystorm/cookbooks,NewSpring/Cookbooks,beni55/cookbooks,sgerrand/cookbooks,criticaljuncture/cookbooks,gravitystorm/cookbooks,dagolden/opscode-cookbooks,danielsdeleo/cookbooks,dbroeglin/cookbooks,sgerrand/cookbooks,NewSpring/Cookbooks,pcreux/cookbooks,DataDog/opscode-cookbooks,beni55/cookbooks,danielsdeleo/cookbooks