[QA] HHVM for "opsen" presentation

[Greg Grossmeier]

I just noticed that Joe (Giuseppe) gave a presentation to the Ops team
this morning on HHVM and the basics they should all know.

Given that we also deal with HHVM in Beta (and future Staging) I thought
this would be good to pass along.

https://docs.google.com/a/wikimedia.org/presentation/d/1_HGqDTGHctzFeKZmjWi7-gfuB43c8RTcML8tiPW56OQ/edit#slide=id.p

If you have any questions, ask Joe :)

Greg

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