Added Typelevel Scala article.

For review and feedback before publishing ...
My experience was that migrating to a compiler plugin instead of a fork solves a lot of problems. Actually, you can do a lot of interesting stuff in compiler plugins (change the parser, change the typer - albeit unofficially). And maybe this initiative would also make it possible to negotiate with Typesafe to expand the current compiler plugin interface, so that it can conveniently and officially accommodate the language extensions that you might be interested in.