Changes

Further ATI (fglrx) X11Display bug workaround/cleanup

    - See https://bugzilla.mozilla.org/show_bug.cgi?id=486277

    - Calling XCloseDisplay occasionally leads to a SIGSEGV,
      even thought the reference is valid and OK.

      Workaround is not to close any X11Display,
      but to hold them stashed and reuse them.
      Since we already pipeline all X11Display's
      via Nativewindow's X11Util, an added referenceCounter
      and a global active/passive list solved this problem.
      This workaround is only active in case 'isVendorATI()'.

NEWT/NativeWindow X11:
    - Let XIOErrorHandler and invalid display references
      fail hard with FatalError, otherwise we won't see
      the stack trace - and those bugs are indeed fatal.

NativeWindow X11:
    - Install XIOErrorHandler, which stays active.
    - X11Util.X11Display:
        - Add reference counter
        - Add global active/passive list.
          Passive if reference count == 0
          and marked as 'un-closeable' (-> ATI).
          Reusing passive members when create a new display.
    -

JOGL:
    - Use DeleteLocalRef() calls to free temp NIO buffer
      in manual *Copied implementation.

    - GLDrawableFactoryImpl: Be serious about the shutdown() semantics

    - *GraphicsConfiguration:
        - Fix the invalid Onscreen/PBuffer/Pixmap determination (X11/EGL/WGL)
        - Just return null if not valid

    - X11GLXGraphicsConfigurationFactory - FBConfig
        - Determine recommendedIndex properly ..
        - Don't bail out if a FBConfig is invalid ..
        - Use Chooser in case nothing is recommended ..

    - X11OffscreenGLXDrawable fixes bugs:
        - wrong (int) cast of parent window in XCreatePixmap call
        - setting display to zero too early in destruction, ie
          before XCloseDisplay

    - X11GLXDrawableFactory is using [singleton] shared dummy resources for
        - Screen, Drawable and Context
      which are utilized in case they are needed ..
      They are removed at shutdown call

    - GLXVersion gathering in GLXUtil now ..

    - DefaultGLCapabilitiesChooser: Respect PBuffer selection

Tests:
    - Add DrawableFactory shutdown()
    - Add various Offscreen Capabilties
    - Add Offscreen and non-pbuffer case

    - JUnit Passed (Linux64bit: NVidia/ATI)
    - demos.jrefract.JRefract passed (Linux64bit: NVidia/ATI)

JOGL (Windows):
    - WindowsWGLDrawableFactory is using [singleton] shared dummy resources for
        - Drawable and Context
      which are utilized in case they are needed ..
      They are removed at shutdown call

    - GLCapabilities
        - Set pbuffer as the HW capabilities show,
          hence onscreen && pbuffer is valid

        - DefaultGLCapabilitiesChooser: Respect PBuffer selection (fixed)
          Only skip a config, if request is !onscreen && pbuffer, but pbuffer n/a

Tests:
    - JUnit Passed (Windows32: Chromium - Except PBuffer (n/a)