Added Crossplatform CubeControl

README.md

 ### CubeControl
 
 CubeControl is a PC software, written in Java and mostly platform-independent, to create Animations for the Cube and send them to it. It depends on [Java3D](http://www.oracle.com/technetwork/java/javase/tech/index-jsp-138252.html) to display a rotatable, clickable 3D View of the LED-Cube. It comes with it's own Serial Library to communicate with the Cube. Compile it with the makefile. You need a working javac and gcc in your Path. To compile under windows get something like [MinGW](http://www.mingw.org/) or try Microsofts compiler.
+A more or less recent Version of CubeControl can be found as CubeControl.jar. It includes a Mac and a Windows Version of the serial driver, so it is compatible with both of these platforms.
 
 ### HardwareEmulator