waitgroup
=========

Simple helper to run asynchronous functions and wait for them to finish before calling a callback function.

Callback use the node.js format:
```js
  cb = function(err, result...){...}
```

Example with dummy asynchronous functions:
```js
waitgroup([function(cb){

    setTimeout(function(){
        cb(null,2);
    }, 2);

}, function(cb){

    setTimeout(function(){
        cb(null,1);
    }, 1);

}], function(err, results){
    console.log("Done",results);
});
```

waitgroup
---------

> *void* = waitgroup( *array* **funcs**, *function* **done** )

Wait for all functions sent in the **funcs** array to complete a call the **done** function.

- *array* **funcs**:

  An array of asynchronous function. See below.

- *function* **done**:

  Will be called when all **funcs** functions are done. Or when a **funcs** function produce an error.

funcs
-----

> function(*func* **done**)

The callback passed as argument to every **funcs** function when they are call by **workgroup()**.

- *func* **done**:

  The callback to indiquate when a **funcs** function is finished, or produce an error.

done
----

> function(*?* **err**, *?* **result**)

TODO: finish it