1) Platform.java stays as abstract class with, but default implementation is removed. Stays in org.luaj.vm package
2) org.luaj.platform package is created to hold concrete Platform implementations
3) Platform.newLuaState() method is introduced to instantiate the LuaState. Other constructors are privatized.
4) Following Platform implementations are created:
J2sePlatform
J2meMidp20Cldc11Platform
J2meMidp10Cldc10Platform
5) All clients of luaj-vm are changed to include startup code that looks something like this:
Platform.setInstance( new J2meMidp20Cldc11Platform() );
LuaState state = Platform.getInstance().newLuaState();
