Update 9.4 release notes.

Tom Lane <tgl@sss.pgh.pa.us>

Commit: 0923b01e3e64d4985ffbdf8ec912e25ad02e0c0c
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2014-12-14T19:58:03Z
Releases: 9.5.0
Update 9.4 release notes.

Set release date, do a final pass of wordsmithing, improve some other
new-in-9.4 documentation.

Files

PathChange+/−
doc/src/sgml/datatype.sgml modified +8 −7
doc/src/sgml/plpgsql.sgml modified +41 −24
doc/src/sgml/release-9.4.sgml modified +94 −139