www/index.html: fix command line demos & promote JOGL NApplet applet

Update Sound3DTest class location for command line demo.

https://jogamp.org/deployment/jogamp-current/joal-demos/jar/ only contains j-ogg-oggd.jar & j-ogg-vorbisd.jar used at compiletime while j-ogg-all.jar is needed at runtime for www.devmaster.net Tutorial lession 8

promote example use of JOGL NApplet applet, to prevent end user frustration, for smooth testing using icedtea-web.

Signed-off-by: Xerxes Rånby <xerxes@zafena.se>