code: function(dataURI) {
          var binary = atob(dataURI.split(',')[1]);
          var mimeString = dataURI.split(',')[0].split(':')[1].split(';')[0];
          var array = [];
  
          for(var i = 0; i < binary.length; i++) {
            array.push(binary.charCodeAt(i));
          }
  
          return new Blob([ new Uint8Array(array) ], { type: mimeString });
        }
docs: Turns the Data URI into a blob so it can be sent over to the server