Log Message:-----------Remove copyright mention of Andrew Yu, per author's permission.
Backpatch to 8.4.X.
Modified Files:-------------- pgsql/src/tutorial: basics.source (r1.5 -> r1.6) (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/tutorial/basics.source?r1=1.5&r2=1.6)
