Lightweight Java Game Library Code

Added Linux native code for window icon setting.

Updated Win32 native interface to use IntBuffers rather than ByteBuffers

Updated to actually convert the passed int buffer

Added methods to set the window icon. MacOS implementation added using AWT images.

Added empty implementation of the window icon setting code in preperation for adding the Linux version.

Added function to set the window icon on win32

automatic polling via Display.update();

support isCreated and destroy (destroy currently ignored)

decrease visibility of classes

added 3rd party native libs