Changes

Generalize SharedResourceRunner and use/impl it for WGL as well (besides X11).

It seems necessary to use off thread shared resources (dummy window, drawable and context)
to keep them alive in Java Webstart.

Add javaws test scripts

Windows RegisterClass: Use new RegisteredClassFactory (window class), Misc.

This solves the issue when an applet is started/stop and started again,
or another applet runs in the same JVM.
Also soves the issue for multiple JVMs.

RegisteredClassFactory can be instanced to manage one shared window class,
currently in use for GDI's dummy window and NEWT.
A class base name and a window proc handle must be passed in the factory cstr.

Before registering, the class is tested if already exists,
eg another applet in the same JVM.
If registration fails, the class name will iterate until successful or MAX_INT reached,
eg if multiple JVMs are running.

Added NativeWindow Common Native Code.

JAWTUtil: Eager initialization of AWT desktop props

Triggers immediate AWT property resolution.
Would reproduce any javaws / AWT race condition.

GLProfile: initialize 1st, debug info later.

Debug shall not change the startup behavior

makeCurrent/release within closures

script updates

Adding misc NEWT docs/notes