code: function () {
  			var self = this;
  			console.log('stopping capture...');
  			var req = get_req();
  			req.onreadystatechange = function stop_capture_response () {
  				if (req.readyState === 4) {
  					self.update_state();
  					console.log('stopped.');
  					jQuery("#stop").hide();
  					jQuery("#start").show();
            htracr.ui.unpulse_logo(true);
  				}
  			};
  			req.open("POST", "/stop", true);
  			req.send("");
  			return false;
  		}
docs: finish capturing a session