Add queue selection support

[sergeyshaykhullin]

jobClient.Enqueue("test", builder =>
{
	for (int i = 0; i < 10; i++)
	{
                // here
		builder.Enqueue<ITestJobs>(t => t.TestMethod(), "queue");
	}
// and/or here
}, "queue");

AtomBuilder.cs

[sergeyshaykhullin]

@ahydrax I created proof of concept https://github.com/ahydrax/Hangfire.Atoms/pull/8