Chunk function

[htuscher]

It would be really great to have a chunk function which splits an array into n equal parts.

Currently something like this can be done with the following code:

_.chain(container.parameter).groupBy(function (el, idx) {
    return Math.floor(idx / 4);
}).toArray().value();

But having this as _.chunk(array, numberOfChunks); would be really great.

[Florian-R]

See #1919 for a currently discussed PR.