fixed regression caused by ee20a616178ac9c1bc4bc679a346ea6fa0f793f1 which re-enabled reading of emacs temporary files (i.e. ending in .md~) as presentation files
fixed regression caused by ee20a616178ac9c1bc4bc679a346ea6fa0f793f1 which re-enabled reading of emacs temporary files (i.e. ending in .md~) as presentation files

slambert/showoff,puppetlabs/showoff,rkh/showoff,wanix/showoff,wanix/showoff,wanix/showoff,ivanoats/parade,rkh/showoff,hybridgroup/showoff,binford2k/showoff,burtlo/parade,nomadicoder/showoff,binford2k/showoff,binford2k/showoff,marrero984/showoff,guidance/nodejs-craft1933,travisvalentine/7.27_showoff,kublaj/showoff,ivanoats/parade,berkes/showoff,berkes/showoff,amiel/showoff,berkes/showoff,marrero984/showoff,slambert/showoff,hybridgroup/showoff,jevy/Presentations,amiel/showoff,puppetlabs/showoff,nomadicoder/showoff,nomadicoder/showoff,guidance/nodejs-craft1933,slambert/showoff,berkes/showoff,nomadicoder/showoff,marrero984/showoff,kublaj/showoff,travisvalentine/7.27_showoff,kublaj/showoff,binford2k/showoff,kublaj/showoff,puppetlabs/showoff,nberger/showoff,berkes/showoff,marrero984/showoff,jevy/Presentations,puppetlabs/showoff,kublaj/showoff,nberger/showoff,burtlo/parade,slambert/showoff