Changes

Bug 1211: Refine NEWTDemoListener, JOGLNewtAppletBase
- NEWTDemoListener.createPointerIcons(..)
 - Use Display instance
 - Simplify PointerIcon creation using a list,
   skipping all non-found resources.
- JOGLNewtAppletBase
 - Bring back reparent action via key 'r'
 - Drop redundant PointerIcon, using NEWTDemoListener

Fix NEWT DisplayImpl.createPointerIcon: Pass through Exceptions, as
required by API doc.

NEWT Window Maximize: re-gain focus after maximize action (maybe lost on
platforms, i.e. OSX)

Unit Tests: Add listening to NEWTDemoListener* (Missed in prev. patch)

Bug 1211: Fix regression of GLMediaPlayerImpl caused by commit
68c8e39fa8d6e700f0a99241c1a01a435b7f6284
GLMediaPlayerImpl.updateAttributes(..):
 - always set state -> Initialized if it was Uninitialized,
   regardless whether we start StreamWorker.
  - No need to handle exceptions here, just throw/pass/propagate them,
   since called catches them and deals w/ 'em.

FFMPEGDynamicLibraryBundleInfo.initSymbols(): Just return null instead
of throwing an exception, it is OK not to have ffmpeg/libav

Unit Tests: NEWTDemoListener: Less verbose; GraphUI-Demos: Show DPI and
Pixel-Scale in GLEventListener.init(...)

TestGearsES2*AWT / NewtDemoListener: Show pixel-scale in title bar.