Revert "Use `mini_racer` from @SamSaffron instead of `therubyracer`"
Revert "Use `mini_racer` from @SamSaffron instead of `therubyracer`"

This reverts commit faeffd76ee3772af78fa01c0da54d6bcd05a9fad.

mwpastore/sinatra,burningTyger/sinatra,burningTyger/sinatra,sinatra/sinatra,burningTyger/sinatra,JonMidhir/sinatra,JonMidhir/sinatra,jkowens/sinatra,sinatra/sinatra,ryanshaw/sinatra,jkowens/sinatra,jkowens/sinatra,mwpastore/sinatra,mwpastore/sinatra,JonMidhir/sinatra,ryanshaw/sinatra