grammar/formatting pass over README
grammar/formatting pass over README

Fix whitespace errors, wrap text sanely, and rework
english a bit.

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