Fix webrat's sinatra session, instead of adapting from rack
Fix webrat's sinatra session, instead of adapting from rack

forresty/integrity,p/integrity,dkastner/prism_ci,integrity/integrity,forresty/integrity,p/integrity,faradayio/ci1,factorylabs/integrity,integrity/integrity,integrity/integrity,erik-escobedo/integrity,factorylabs/integrity,faradayio/ci1,erik-escobedo/integrity