add prevStep() function
add prevStep() function
kublaj/showoff,karmajunkie/wtfomg,hybridgroup/showoff,marrero984/showoff,burtlo/parade,jiachenwang/showoff,nberger/showoff,kublaj/showoff,berkes/showoff,guidance/nodejs-craft1933,ivanoats/parade,slambert/showoff,nomadicoder/showoff,puppetlabs/showoff,slambert/showoff,wanix/showoff,pote/takeoff,travisvalentine/7.27_showoff,wanix/showoff,slambert/showoff,travisvalentine/7.27_showoff,berkes/showoff,jiachenwang/showoff,nomadicoder/showoff,technoweenie/showoff,jevy/Presentations,pote/takeoff,kublaj/showoff,technoweenie/showoff,jevy/Presentations,wanix/showoff,binford2k/showoff,jiachenwang/showoff,puppetlabs/showoff,pote/takeoff,marrero984/showoff,marrero984/showoff,puppetlabs/showoff,marrero984/showoff,openminds/showoff-presentations,slambert/showoff,guidance/nodejs-craft1933,puppetlabs/showoff,kublaj/showoff,rkh/showoff,binford2k/showoff,nomadicoder/showoff,berkes/showoff,kublaj/showoff,nberger/showoff,binford2k/showoff,amiel/showoff,nomadicoder/showoff,burtlo/parade,openminds/showoff-presentations,ivanoats/parade,binford2k/showoff,hybridgroup/showoff,karmajunkie/wtfomg,amiel/showoff,berkes/showoff,berkes/showoff,rkh/showoff