update requirements section, fixes #472
update requirements section, fixes #472

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