test runner for scala (not working)
I don't know why it throws a ClassCastException during the test:

    org.vertx.scala.tests.core.http.ScalaHttpTest > testCreateServer
FAILED
        org.vertx.java.platform.PlatformManagerException: Failed to
instantiate verticle factory
    
            Caused by:
            java.lang.ClassCastException:
org.vertx.scala.platform.impl.ScalaVerticleFactory cannot be cast to
org.vertx.java.platform.VerticleFactory
Allow running Scala scripts (as well as Scala classes)

* If tries running it as a script and if it fails, it falls back on
running as a Vert.x verticle class implementation.
* The Scala interpreter verbose levels can be controlled with
vertx.scala.interpreter.verbose system property
* Provided a unit test that verifies that both scripts and Scala
classes can be compiled and run accordingly.
code review + put all scripts (VerticleClass!) into src/test/scripts
fix build script stuff to be able to use TestVerticle
a few tests (mostly stubs)