Added Core* lazy initializers; marked JoglCoreGL with TODOs; non-core removal

-Lazy initializers for CoreVAO, CoreVBO
-Fixed SuperSimpleExampleMain (JOGL working, my system won't run LWJGL for whatever reason)
-Rewrote CoreSetupJogl
-Modified RenderLoopCallback interface to make more sense :)
-Moved examples to single package (de.lessvoid.coregl.examples)
-Added CoreExample