made compatible with python3
dropped .DS_Store
allowed for writing to string as well as file
forgot the : after def writeslides
changed name of process to render_slides
shuffled some parse functions
made a mistake when mving file open to the process_slides function
I had accidentally clobbered the name markdown in render_slides
Merge pull request #15 from wesesque/master

Altered slidedeck for python3 compatibility