loadTable suggested changes

loadTable.js

p5.prototype.loadTable = function (path) {
  var callback = null;
  var options = [];
  var header = false;
  var sep = ',';
  var decrementPreload = p5._getDecrementPreload.apply(this, arguments);
  var args = new Array(arguments.length);
  for (var i = 0; i < args.length; ++i) {
    args[i] = arguments[i];
  }
  for (var i = 1; i < args.length; i++) {
    if ((typeof (args[i]) === 'function') &&
      (args[i] !== decrementPreload)) {
      callback = args[i];
    } else if (args[i] === true) {
      options.push(args[i]);
      header = true;
    }
    else if (arguments[i] === ',') {
      sep = ',';
    } else if (arguments[i] === '\t') {
      sep = '\t';
    }
  }
}