updated readme with preshow information
updated readme with preshow information

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