execute() {
    this._initInvocationChain();

    this.args = Array.prototype.slice.call(arguments);
    this.reenable();
    this.reenabled = true;
    this.run();
  }
@name jake.Task#execute
    @function
    @description Run only this task, without prereqs. If the task has already
    been run, *will* run the task again.