new xstream and xpp3 jar files in classpath

[gunn]

It turns out that the older version of xstream (1.3.x) are not compatible with Java 7. (Google "java 7 xstream" to see details).

So, I have changed the default classpath of the jreality SVN project to use the newer jars (xstream-1.4.3.jar and xpp3-1.1.4c.jar) instead of the older versions (named simply xstream.jar and xpp3.jar).

Please report any problems with these newer jars on this thread.