README markup tweaks.
README markup tweaks.

laplaceliu/sinatra,porras/sinatra,DoraALin/sinatra,eileencodes/sinatra,twanies/sinatra,guidohcosta/sinatra,mwpastore/sinatra,kyontan/sinatra,miyazawatomoka/sinatra,defsprite/sinatra,dariubs/sinatra,jkowens/sinatra,mwpastore/sinatra,mwpastore/sinatra,eileencodes/sinatra,burningTyger/sinatra,gferguson-gd/sinatra,guidohcosta/sinatra,ABaldwinHunter/sinatra-classic,Rayheng/sinatra,midorineko/sinatra,cyberid41/sinatra,dariubs/sinatra,marocchino/sinatra,JonMidhir/sinatra,d-bot/sinatra,Rayheng/sinatra,ryanshaw/sinatra,sinatra/sinatra,nju520/sinatra,kumji/sinatra,QLGu/sinatra,davydovanton/sinatra,Callygraphy/morrissey,Wirachmat/sinatra,trexnix/sinatra,autopp/sinatra,jkowens/sinatra,JonMidhir/sinatra,frechei/sinatra,ganmacs/sinatra,wzheng1/sinatra,trexnix/sinatra,burningTyger/sinatra,lastcat/sinatra,bmizerany/sinatra,kgrz/sinatra,cyberid41/sinatra,defsprite/sinatra,d-bot/sinatra,JonRowe/sinatra,ktw1222/sinatra,kumji/sinatra,autopp/sinatra,RosenDimov/sinatra,davydovanton/sinatra,howtolearntocode/sinatra,sinatra/sinatra,nicoayala/sinatra,ganmacs/sinatra,emiliocorpus/sinatra,sethuster/sinatra,gferguson-gd/sinatra,howtolearntocode/sinatra,midorineko/sinatra,lastcat/sinatra,QLGu/sinatra,ryanshaw/sinatra,RosenDimov/sinatra,JonMidhir/sinatra,JonRowe/sinatra,laplaceliu/sinatra,blambeau/sinatra,ksw2599/sinatra,siberianbear/sinatra,emiliocorpus/sinatra,kyontan/sinatra,jkowens/sinatra,ABaldwinHunter/sinatra-classic,jenalgit/sinatra,ksw2599/sinatra,sethuster/sinatra,burningTyger/sinatra,twanies/sinatra,Wirachmat/sinatra,jenalgit/sinatra,frechei/sinatra,nicoayala/sinatra,wzheng1/sinatra,nju520/sinatra,miyazawatomoka/sinatra,DoraALin/sinatra,siberianbear/sinatra,ktw1222/sinatra,porras/sinatra