Updated Scala docs for around tests
Updated ScalaTest (markdown)
add explanation to include multiple examples in a single spec
Remove useless logger.
Add some test code to show how to unit test controllers.
Run one test class.
Updated Testing your application (markdown)
added scala syntax highlighting
Added additional import statements, since it seems the remainin examples draw on this (showing incomplete tests, using "bla bla" in { /* new example */ }. And without these imports I was going crazy with errors like `Object TestServer is not a value` error messages because I mistakenly imported play.test._ and play.test.Helpers._... I'm also a scala newbie..
Documentation copy-editing
Documentation refactoring