Add changelog for 1.4.6
Add changelog for 1.4.6

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