Adaptations to Eclipse IDE

* IrofShape: Transference to com.bugworm.irof. Converted to
scalafx.application.JFXApp
* AdventCalendar, Enemies: References to scala.Math object (deprecated)
replaced with scala.math package.
AdventCalendar refactoring

AdventCalendar Converted to JFXApp subclass. Balloon with screen
parameter in constructor.
Enemy and subclasses refactored