TODO: create presentation containing background, objectives, features, and limitations of the application
DONE: create view list of card-sets using RecyclerView
HOLD: create model class for card-set containing set title, list of items, and index for last viewed item
DONE: create view showing question, previous button, next button, and show/hide button for answer
DONE: make a new view open when a card-set is clicked by passing the card-set id to the new activity
create model class for item containing question and answer
import library for converting markdown file into java object
create method to extract questions and answers from java object
create view for importing markdown files from filesystem or url (github)
write logic to extract data from imported file
write method for saving card-set to database
write method to view list of card-sets stored in database