pgsql: Move full text search operators, functions, and data type

Log Message:
-----------
Move full text search operators, functions, and data type sections into
the main documentation, out of its own text search chapter.

Modified Files:
--------------
pgsql/doc/src/sgml:
datatype.sgml (r1.207 -> r1.208)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/datatype.sgml?r1=1.207&r2=1.208)
func.sgml (r1.388 -> r1.389)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/func.sgml?r1=1.388&r2=1.389)
textsearch.sgml (r1.5 -> r1.6)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/textsearch.sgml?r1=1.5&r2=1.6)