added new function replace from Joel Reed. added new test case for above.

        * libexslt/strings.c: added new function replace from Joel
          Reed.
        * tests/exslt/Makefile.am, replace.1.xml, replace.1.xsl,
          replace.1.out: added new test case for above.
        * libxslt.spec.in: trivial change from Gnome to GNOME
        * configure.in: trivial change for flags on my compilations
        * libxslt/documents.c, libxslt/documents.h, libxslt/keys.c,
          libxslt/keys.h, libxslt/variables.c, libxslt/templates.c,
          libxslt/transform.c, libxslt/variables.c, libxslt/xslt.c,
          libxslt/xsltutils.c: fixed some documentation/comments and
          compilation warnings - no change to logic.
        * re-generated the documentation.

svn path=/trunk/; revision=1413