added Batch extension method

[rudygt]

Hi,

I created a simple batch metod, to create buckets of a given size over a collection.

thanks!

[jreina]

Nice! That's a seriously bad ass extension method!

I'll try to get this reviewed over the weekend but I want to thank you up front for adding this.

[jreina]

Looks good. Thank you for your contribution.

[rudygt]

my pleasure, Thanks!