Using `Y.Parallel` for batch async function calls.

Why Parallel

You may need to do a batch of asyncronious function calls and never care that each one is done, you just care that all of them are done. That's where `Y.Parallel` comes in handy.

Using Parallel

`Y.Parallel` is more like a stack tool than anything else. First you create your stack:

``` var stack = new Y.Parallel(); ```

Then you can start adding callbacks to that stack:

``` var stack = new Y.Parallel(); stack.add(function() {}); stack.add(function() {}); stack.add(function() {}); stack.add(function() {}); ```

Finally, you listen for the stack to be complete:

``` stack.done(function() { Y.log('Stack complete'); }); ```

Simple Example

This is a simple example of calling a callback once all 5 of the `Y.later` calls have completed.

``` {{>parallel}} ```