pgstatsinfo - pg_statsinfo: - Add regression test.

Log Message:
-----------
- Add regression test.
- Change the schema name of target database into "targetdb" from "statsinfo".
- Add foreign keys to each tables.
- Make autovacuum-log.done and checkpoint-log.done removing transactional.

Modified Files:
--------------
pg_statsinfo/pg_statsinfo:
Makefile (r1.1.1.1 -> r1.2)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgstatsinfo/pg_statsinfo/pg_statsinfo/Makefile?r1=1.1.1.1&r2=1.2)
pg_statsinfo/pg_statsinfo/stats_info:
Makefile (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgstatsinfo/pg_statsinfo/pg_statsinfo/stats_info/Makefile?r1=1.2&r2=1.3)
stats_info.c (r1.5 -> r1.6)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgstatsinfo/pg_statsinfo/pg_statsinfo/stats_info/stats_info.c?r1=1.5&r2=1.6)
stats_info_sql.h (r1.6 -> r1.7)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgstatsinfo/pg_statsinfo/pg_statsinfo/stats_info/stats_info_sql.h?r1=1.6&r2=1.7)
pg_statsinfo/pg_statsinfo/target_db:
target_db.sql.in (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgstatsinfo/pg_statsinfo/pg_statsinfo/target_db/target_db.sql.in?r1=1.2&r2=1.3)
uninstall_target_db.sql (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgstatsinfo/pg_statsinfo/pg_statsinfo/target_db/uninstall_target_db.sql?r1=1.2&r2=1.3)