iLanguage/OPrime#16 Added start button and changed flow (no longer defaults to settings); TODO make prettier.
Added stimuli folder for creating new versions of the app; all images and audio go in the stimuli folder; editing the stimuli.csv file will determine the order and grouping of image/audio; running create_new_stimuli.R script copies and renames the files and creates a new xml of string-arrays for the app.