Add (sxml match).

Add (sxml match).

* module/Makefile.am (LIB_SOURCES): Add `sxml/match.scm'.
  (NOCOMP_SOURCES): Add `sxml/sxml-match.ss'.

* module/sxml/match.scm, module/sxml/sxml-match.ss: New files.

* test-suite/Makefile.am (SCM_TESTS): Add `tests/sxml.match.test'.
  (EXTRA_DIST): Add `tests/sxml-match-tests.ss'.

* test-suite/tests/sxml-match-tests.ss,
  test-suite/tests/sxml.match.test: New files.

* doc/ref/guile.texi (Guile Modules): Include `sxml-match.texi'.

* doc/ref/sxml-match.texi: New file.

* doc/ref/Makefile.am (guile_TEXINFOS): Add `sxml-match.texi'.