too many Xerces...

The inclusion of the 'xerces_2_5_0.jar' file is causing problems. Many 
of those classes are included in Java 8, and somehow the ones in the 
included jar file are incompatible.  I tried running a NASA WorldWind 
demo using Java 8, and received a AbstractMethodError when some of the 
WorldWind code tried to call DocumentBuilderFactory::setFeature().

That version of Xerces is pretty old anyway (> 10 years). Especially 
since the "org.apache.xerces.jaxp" classes are included in "rt.jar" in 
Java 8, the 'xerces_2_5_0.jar' should be omitted from the distribution, 
or, at least, add a note in the README that the 'batik' code shouldn't 
be used with Java 8.

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