[libpng16] Bump version to 1.6.13beta04

ANNOUNCE

@@ -1,4 +1,4 @@
-Libpng 1.6.13beta03 - August 2, 2014
+Libpng 1.6.13beta04 - August 3, 2014
 
 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.
@@ -8,20 +8,20 @@ Files available for download:
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   1.6.13beta03.tar.xz (LZMA-compressed, recommended)
-   1.6.13beta03.tar.gz
+   1.6.13beta04.tar.xz (LZMA-compressed, recommended)
+   1.6.13beta04.tar.gz
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lp1613b03.7z  (LZMA-compressed, recommended)
-   lp1613b03.zip
+   lp1613b04.7z  (LZMA-compressed, recommended)
+   lp1613b04.zip
 
 Other information:
 
-   1.6.13beta03-README.txt
-   1.6.13beta03-LICENSE.txt
-   libpng-1.6.13beta03-*.asc (armored detached GPG signatures)
+   1.6.13beta04-README.txt
+   1.6.13beta04-LICENSE.txt
+   libpng-1.6.13beta04-*.asc (armored detached GPG signatures)
 
 Changes since the last public release (1.6.13):
 
@@ -43,12 +43,14 @@ Version 1.6.13beta02 [July 21, 2014]
     Also fixed makefile.bc32, makefile.bor, makefile.msc, makefile.intel, and
     makefile.tc3 similarly.
 
-Version 1.6.13beta03 [August 2, 2014]
+Version 1.6.13beta03 [August 3, 2014]
   Removed scripts/makefile.elf. It has not worked since libpng-1.5.0beta14
     due to elimination of the PNG_FUNCTION_EXPORT definition from pngconf.h.
   Ensure that CMakeLists.txt makes the target "lib" directory before making
     symbolic link into it (SourceForge bug report #226 by Rolf Timmermans).
 
+Version 1.6.13beta04 [August 3, 2014]
+
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
 https://lists.sourceforge.net/lists/listinfo/png-mng-implement