textsearch-ja - textsearch_groonga: Support <, <=, =, >=, >, <> for

Log Message:
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Support <, <=, =, >=, >, <> for several built-in types in groonga index.
Rename operator %% (doc, query) to @@ to avoid confusion with %% (doc, key).
Tested with 9.1dev, 9.0, and 8.4.
bugfix: groonga path should be absolute paths.

Modified Files:
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textsearch_groonga:
Makefile (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/textsearch-ja/textsearch_groonga/Makefile?r1=1.3&r2=1.4)
textsearch_groonga.c (r1.8 -> r1.9)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/textsearch-ja/textsearch_groonga/textsearch_groonga.c?r1=1.8&r2=1.9)
textsearch_groonga.sql.in (r1.7 -> r1.8)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/textsearch-ja/textsearch_groonga/textsearch_groonga.sql.in?r1=1.7&r2=1.8)
textsearch_groonga/expected:
textsearch_groonga.out (r1.9 -> r1.10)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/textsearch-ja/textsearch_groonga/expected/textsearch_groonga.out?r1=1.9&r2=1.10)
textsearch_groonga/sql:
textsearch_groonga.sql (r1.8 -> r1.9)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/textsearch-ja/textsearch_groonga/sql/textsearch_groonga.sql?r1=1.8&r2=1.9)

Added Files:
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textsearch_groonga:
groonga_types.c (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/textsearch-ja/textsearch_groonga/groonga_types.c?rev=1.1&content-type=text/x-cvsweb-markup)
textsearch_groonga.h (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/textsearch-ja/textsearch_groonga/textsearch_groonga.h?rev=1.1&content-type=text/x-cvsweb-markup)