add README.ko.rdoc for Korean translation
add README.ko.rdoc for Korean translation

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