adding .gitignore file (with rules for files/extensions to be ignored by git)
adding sql schema for mooc-posters.in database
adding create_posters.py (This python script is run at periodic intervals to check if any new courses had been added on a MOOC provider's website and create corresponding PDF posters for all new courses).

Work in progress. Right now, this script can fetch Coursera's course list JSON file and sets up a database for storing this info.