Extract Author Names

ReadCiteSeerXML.java - cleans up the original XML to finally contain
only author names surrounded by tags as
<ListRecords><record><metadata><creator>

ExtractCollaborators.xsl - extracts author names from xml output of
"ReadCiteSeerXML.java" named "citeseerx_alldata_formatted.xml" and give
out the list of comma separated authors, 1 line per publication.

BuildCollabGraph - will use this file to make the collaboration graph,
currently contains nothing useful