[libpng17] Bump version to 1.7.0beta27

ANNOUNCE

@@ -1,5 +1,5 @@
 
-Libpng 1.7.0beta26 - January 1, 2014
+Libpng 1.7.0beta27 - January 1, 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.
@@ -9,19 +9,19 @@ Files available for download:
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   1.7.0beta26.tar.xz (LZMA-compressed, recommended)
-   1.7.0beta26.tar.gz
+   1.7.0beta27.tar.xz (LZMA-compressed, recommended)
+   1.7.0beta27.tar.gz
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lp170b26.7z  (LZMA-compressed, recommended)
-   lp170b26.zip
+   lp170b27.7z  (LZMA-compressed, recommended)
+   lp170b27.zip
 
 Other information:
 
-   1.7.0beta26-README.txt
-   1.7.0beta26-LICENSE.txt
+   1.7.0beta27-README.txt
+   1.7.0beta27-LICENSE.txt
    Gnupg/*.asc (PGP armored detached signatures)
 
 Changes since the last public release (1.6.0):
@@ -486,6 +486,8 @@ Version 1.7.0beta26 [January 1, 2014]
     libpng17/png.h and libpng17.a). Three new configure options and some
     rearrangement of Makefile.am allow creation of these links to be disabled.
 
+Version 1.7.0beta27 [January 1, 2014]
+
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