Zynga announced yesterday that it was laying off about 18% of its work staff, or about 520 employees, which is bad news for any company. But it turns out that this set of folks includes most of the crew of OMGPOP, the company Zynga acquired for its uber popular app Draw Something last year. It was only last March that Zynga picked up OMGPOP for $200 million after Draw Something became a big hit, and while the app did both grow and spawn a sequel