[libpng16] Bump version to 1.6.17beta01

ANNOUNCE

@@ -1,36 +1,31 @@
-Libpng 1.6.16 - December 22, 2014
+Libpng 1.6.17beta01 - December 22, 2014
 
-This is a public release of libpng, intended for use in production codes.
+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.
 
 Files available for download:
 
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   libpng-1.6.16.tar.xz (LZMA-compressed, recommended)
-   libpng-1.6.16.tar.gz
+   1.6.17beta01.tar.xz (LZMA-compressed, recommended)
+   1.6.17beta01.tar.gz
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lpng1616.7z  (LZMA-compressed, recommended)
-   lpng1616.zip
+   lp1617b01.7z  (LZMA-compressed, recommended)
+   lp1617b01.zip
 
 Other information:
 
-   libpng-1.6.16-README.txt
-   libpng-1.6.16-LICENSE.txt
-   libpng-1.6.16-*.asc (armored detached GPG signatures)
+   1.6.17beta01-README.txt
+   1.6.17beta01-LICENSE.txt
+   libpng-1.6.17beta01-*.asc (armored detached GPG signatures)
 
-Changes since the last public release (1.6.15):
-  Added ".align 2" to arm/filter_neon.S to support old GAS assemblers that
-    don't do alignment correctly.
-  Revised Makefile.am and scripts/*.dfn to work with MinGW/MSYS;
-    renamed scripts/*.dfn to scripts/*.c (Bob Friesenhahn and John Bowler).
-  Quiet a "comparison always true" warning in pngstest.c (John Bowler).
-  Restored a test on width that was removed from png.c at libpng-1.6.9
-    (Bug report by Alex Eubanks).
-  Fixed an overflow in png_combine_row with very wide interlaced images.
+Changes since the last public release (1.6.16):
+
+Version 1.6.17beta01 [December 22, 2014]
 
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