Updated readme from when apply was renamed foreach.

This change occurred in c5e5e4c but the readme wasn't updated.

Author: SSheldon

README.md

@@ -27,7 +27,7 @@ queue.async(|| println!("World"));
 Concurrent dispatch queues execute tasks concurrently. GCD provides global
 concurrent queues that can be accessed through the `Queue::global` function.
 
-`Queue` has two methods that can simplify processing data in parallel, `apply`
+`Queue` has two methods that can simplify processing data in parallel, `foreach`
 and `map`:
 
 ``` rust
@@ -36,7 +36,7 @@ use dispatch::{Queue, QueuePriority};
 let queue = Queue::global(QueuePriority::Default);
 
 let mut nums = vec![1, 2];
-queue.apply(&mut nums, |x| *x += 1);
+queue.foreach(&mut nums, |x| *x += 1);
 assert!(nums == [2, 3]);
 
 let nums = queue.map(nums, |x| x.to_string());