Update documentations for pg_reorg 1.1.10
Modify output messages to show target table name and steps with INFO level.

In former implementation, pg_reorg does not tell the target table name and
what it is doing with INFO log level. Some users told me that these information
is useful when doing pg_reorg aginst a database ,or against a very large table.
So, this fix changes that pg_reorg outputs these information with INFO log level.
One who wants without these information, please use with WARN or more.