changed data storage for free-sort to use JSON encoding
changed data storage for free-sort to use JSON encoding

erikasf/jsPsych,adrianoesch/jsPsych,andyh616/jsPsych,vergenzt/jsPsych,shamrt/jsPsych,Scienthusiast/jsPsych,msrresearch/jsPsych,jspsych/jsPsych,Scienthusiast/jsPsych,jodeleeuw/jsPsych,shamrt/jsPsych,vergenzt/jsPsych,andyh616/jsPsych,wolfgangwalther/jsPsych,jspsych/jsPsych,erikasf/jsPsych,jspsych/jsPsych,jspsych/jsPsych,wolfgangwalther/jsPsych,adrianoesch/jsPsych