Update README.es.md
Update README.es.md

Few fixes, minor misspellings et alia.
lastcat/sinatra,gferguson-gd/sinatra,sethuster/sinatra,burningTyger/sinatra,midorineko/sinatra,kumji/sinatra,sinatra/sinatra,defsprite/sinatra,Rayheng/sinatra,jkowens/sinatra,dariubs/sinatra,Wirachmat/sinatra,cyberid41/sinatra,kumji/sinatra,porras/sinatra,d-bot/sinatra,autopp/sinatra,dariubs/sinatra,ksw2599/sinatra,ksw2599/sinatra,guidohcosta/sinatra,porras/sinatra,howtolearntocode/sinatra,ganmacs/sinatra,ganmacs/sinatra,sinatra/sinatra,ryanshaw/sinatra,ktw1222/sinatra,miyazawatomoka/sinatra,JonMidhir/sinatra,ryanshaw/sinatra,ktw1222/sinatra,siberianbear/sinatra,JonMidhir/sinatra,midorineko/sinatra,davydovanton/sinatra,Rayheng/sinatra,QLGu/sinatra,JonMidhir/sinatra,wzheng1/sinatra,lastcat/sinatra,DoraALin/sinatra,nju520/sinatra,nju520/sinatra,jkowens/sinatra,jkowens/sinatra,emiliocorpus/sinatra,miyazawatomoka/sinatra,mwpastore/sinatra,kyontan/sinatra,JonRowe/sinatra,howtolearntocode/sinatra,cyberid41/sinatra,eileencodes/sinatra,JonRowe/sinatra,mwpastore/sinatra,DoraALin/sinatra,marocchino/sinatra,QLGu/sinatra,wzheng1/sinatra,frechei/sinatra,nicoayala/sinatra,laplaceliu/sinatra,kyontan/sinatra,burningTyger/sinatra,defsprite/sinatra,Wirachmat/sinatra,nicoayala/sinatra,ABaldwinHunter/sinatra-classic,guidohcosta/sinatra,sethuster/sinatra,trexnix/sinatra,burningTyger/sinatra,RosenDimov/sinatra,ABaldwinHunter/sinatra-classic,jenalgit/sinatra,eileencodes/sinatra,trexnix/sinatra,emiliocorpus/sinatra,frechei/sinatra,laplaceliu/sinatra,siberianbear/sinatra,autopp/sinatra,jenalgit/sinatra,d-bot/sinatra,davydovanton/sinatra,RosenDimov/sinatra,gferguson-gd/sinatra,mwpastore/sinatra