Implement JavaFX HelloWorld application

There is an issue: as of JDK 1.7u45 JavaFX runtime, jfxrt.jar, is not placed on CLASSPATH by default. As a workaround I've put it into ext library. But there should be another way to make it compile with a single mvn command on unmodified JDK. I'm almost shure, Travis-CI won't pass.
Yout advice is needed.

UPDATE: Problem solved. At last deceision was made to use Java8, and (thanks Piotr from Travis-CI support) correct settings for .travis.yml were figured out.