Method CallAsync

include/CobaltFusion/Executor.h:110–116

	template <typename Fn>
	auto CallAsync(Fn fn)
	{
		auto pTask = std::make_shared<std::packaged_task<decltype(fn()) ()>>(fn);
		auto f = pTask->get_future();
		Add([pTask]() { (*pTask)(); });
		return f;
	}

	bool IsExecutorThread() const;
	bool IsIdle() const;