Log Message:
Update tokyocabinet to 1.3.18.

Changes:
2008-11-10  Mikio Hirabayashi

	* tcutil.c (tcptrlistnew, tcptrlistdel): new functions.

	* tcbdb.c (tcbdbputimpl, tcbdboutimpl, tcbdbgetimpl): new functions.

	- Release: 1.3.18

2008-11-07  Mikio Hirabayashi

	* tcutil.c (tcmdbnew, tcmdbdel, tcmdbopen, tcmdbclose): new functions.

	* tcadb.c (tcadbnew, tcadbdel): on-memory tree database is now supported.

	- Release: 1.3.17