Modified make system and docsys area to support the version of Xalan shipped...

Modified make system and docsys area to support the version of Xalan shipped with Ubuntu 10.04. Fixes #311. References #338.

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@3110 41f8697f-d340-4b68-9986-7bafba869bb8