[master] Bump to version 1.4.5rc04

ANNOUNCE

@@ -1,5 +1,5 @@
 
-Libpng 1.4.5rc03 - December 3, 2010
+Libpng 1.4.5rc04 - December 9, 2010
 
 This is not intended to be a public release.  It will be replaced
 within a few weeks by a public version or by another test version.
@@ -9,20 +9,20 @@ Files available for download:
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   1.4.5rc03.tar.xz (LZMA-compressed, recommended)
-   1.4.5rc03.tar.gz
-   1.4.5rc03.tar.bz2
+   1.4.5rc04.tar.xz (LZMA-compressed, recommended)
+   1.4.5rc04.tar.gz
+   1.4.5rc04.tar.bz2
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lp145r03.zip
-   lp145r03.7z
+   lp145r04.zip
+   lp145r04.7z
 
 Other information:
 
-   1.4.5rc03-README.txt
-   1.4.5rc03-LICENSE.txt
+   1.4.5rc04-README.txt
+   1.4.5rc04-LICENSE.txt
 
 Changes since the last public release (1.4.4):
 
@@ -46,7 +46,7 @@ version 1.4.5beta04 [November 8, 2010]
 version 1.4.5rc01 [November 19, 2010]
   No changes.
 
-version 1.4.5beta05 [December 3, 2010]
+version 1.4.5beta05 [December 9, 2010]
   Removed some extraneous parentheses that appeared in pngrutil.c of
     libpng-1.4.3beta01
   Revised png_get_uint_32, png_get_int_32, png_get_uint_16 (Cosmin)
@@ -77,12 +77,9 @@ version 1.4.5beta07 [November 25, 2010]
 version 1.4.5rc02 [December 2, 2010]
   No changes.
 
-version 1.4.5rc03 [December 3, 2010]
+version 1.4.5rc03 [December 9, 2010]
   Added missing vstudio/*/*.vcxproj files to the zip and 7z distributions.
 
-version 1.4.5rc04 [December 8, 2010]
-  Removed PNG_NO_WRITE_GAMMA from pngminim/encoder/pngusr.h
-
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