Changes

Javadoc: Adding packages containing JogampVersion derivations; DevDoc: Add jogl/gluegen packages
    com.jogamp.opengl
    com.jogamp.nativewindow

    developer javadoc:
       com.jogamp.gluegen.opengl
       com.jogamp.gluegen.runtime.opengl

Use common javadoc file structure 'javadoc/<module>/<javadoc-type>' and zip all <module>/** to javadoc.zip. This shall be done for all jogamp modules

Add javadoc target 'javadoc.nw.spec.zip' to test without using up to much resources

X11: Make X11 error handler quiet where we expect an X11 error, ie OpenGL 4 not available ..

NEWT Lifecycle remodel: Window destroy() !

NEWT's removed:
   Window:         destoy(boolean unrecoverable)
   Display/Screen: get/set DestroyWhenUnused(boolean)

We behave as follows:
   - Window.destroy() always decr Screen's reference counter,
     which issues destruction when reached zero.
     Then Screen does the same for Display ..

   - Window.destroy() keeps alive all references,
     hence it can be always recreated via setVisible(true).

   - Window.destroy() ensures Display's EDT is stopped
     if display is destroyed.

   - Window.invalidate() actually removes all Object reference,
     hence it cannot be recreated or used after it.
     This method exist to support a way to cleanup memory, GC.

All test passed on Linux/X11 and Windows