Added Typelevel Scala article.

For review and feedback before publishing ...
No problem with that. I was merely commenting on the fact that when someone reads "The Scala Virtualized compiler is focused on language virtualization and staging", they don't get a lot of information about the nature of the project. The provided text alone leaves it open whether it's a completely different Scala implementation, which is most certainly not the case. It'd just be good to minimize the ways in which this text can be misleading, in particular to a non-Scala audience as found on forums like Hacker News etc.