fixed wrong image paths generated in static html export (apply for pdf one as well)
fixed wrong image paths generated in static html export (apply for pdf one as well)

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