[libpng14] Bump version to 1.4.13beta03

ANNOUNCE

@@ -1,5 +1,5 @@
 
-Libpng 1.4.13beta02 - January 22, 2013
+Libpng 1.4.13beta03 - January 22, 2013
 
 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
 
-   1.4.13beta02.tar.xz (LZMA-compressed, recommended)
-   1.4.13beta02.tar.gz
-   1.4.13beta02.tar.bz2
+   1.4.13beta03.tar.xz (LZMA-compressed, recommended)
+   1.4.13beta03.tar.gz
+   1.4.13beta03.tar.bz2
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lp1413b02.7z (LZMA-compressed, recommended)
-   lp1413b02.zip
+   lp1413b03.7z (LZMA-compressed, recommended)
+   lp1413b03.zip
 
 Other information:
 
-   1.4.13beta02-README.txt
-   1.4.13beta02-LICENSE.txt
+   1.4.13beta03-README.txt
+   1.4.13beta03-LICENSE.txt
 
 Changes since the last public release (1.4.11):
 
@@ -42,6 +42,8 @@ version 1.4.13beta02 [January 22, 2013]
     in configure.ac
   Changed default value of PNG_USER_CACHE_MAX from 0 to 32767 in pngconf.h.
 
+version 1.4.13beta03 [January 22, 2013]
+
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