1. Move jhilight styles from vaaclipse styles.css to cassandra theme
contribution
2. Add jiglight jar to cassadra app bundle (as a part of bundle internal
classpath)
3. Reimplement java source highlight using jhiglight (CodeLabel addon is
not ported to vaadin 7)
4. Move the most of functionality from JavaEditor and XmlEditor to base
class JHightlightEditor