add link to rubydoc.info in spanish readme
add link to rubydoc.info in spanish readme

Signed-off-by: Konstantin Haase <a90ceb496d9228fe419696e09c742e68f13c38e0@googlemail.com>

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