Checking this in before I pull the thread code out to its own file.

examples/sample_tasks.rs

@@ -8,5 +8,11 @@ use apprentice::*;
 
 pub fn main()
 {
-   println!("Hello world");
+   let mut scheduler: Scheduler;
+
+   scheduler = Scheduler::new(None, Some(4));
+   scheduler.queue_task(Task::new("Test"));
+   scheduler.process_tasks(true);
+   scheduler.process_tasks(true);
+   //scheduler.process_tasks(true);
 }