Log Message:
Update to 1.0.31; add test target.
New since 1.0.30:
   - bugfixes: xsl:copy on namespace nodes, AVT for xsl:sort order, fix for
    the debugger (Keith Isdale), output filename limitation, trio.h and
    triodef.h added (Albert Chin), EXSLT node-set (Peter Breitenlohner),
    xsltChoose and whitespace (Igor Zlatkovic),
    stylesheet compilation (Igor Zlatkovic), NaN and sort (William Brack),
    RVT bug introduced in 1.0.30
   - avoid generating " (fix in libxml2-2.5.8)
   - fix 64bit cleaness problem and compilation troubles introduced in
  1.0.30
   - Windows makefile generation (Igor Zlatkovic)
   - HP-UX portability fix