Prefix paths with name and version no. in tars and zips (XDT-527). Stop various unnecessary files (intermediate maven artifacts and log files) being included in distribution archives.
Allow XDoclet to build on its own i.e. without xjavadoc sources, just the jar. The only xdoclet-like tag in XJavadocTask is an @ant.ignore, so hopefully this doesn't break the maven pl
ugin.