[master] Bump version to 1.4.6beta01

ANNOUNCE

@@ -1,40 +1,66 @@
 
-Libpng 1.4.5 - December 9, 2010
+Libpng 1.4.6beta01 - December 27, 2010
 
-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-1.4.5.tar.xz (LZMA-compressed, recommended)
-   libpng-1.4.5.tar.gz
-   libpng-1.4.5.tar.bz2
+   1.4.6beta01.tar.xz (LZMA-compressed, recommended)
+   1.4.6beta01.tar.gz
+   1.4.6beta01.tar.bz2
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lpng145.zip
-   lpng145.7z
+   lp146b01.zip
+   lp146b01.7z
 
 Other information:
 
-   libpng-1.4.5-README.txt
-   libpng-1.4.5-LICENSE.txt
+   1.4.6beta01-README.txt
+   1.4.6beta01-LICENSE.txt
 
 Changes since the last public release (1.4.4):
 
-  Fixed possible configure.ac bug introduced in version 1.4.4.
+version 1.4.5beta01 [September 25, 2010]
+  Fixed possible configure.ac bug introduced in version 1.4.4rc05.
+  Rebuilt configure scripts with autoconf-2.68 instead of autoconf-2.65
+
+version 1.4.5beta02 [October 5, 2010]
+  Reverted configure scripts to autoconf-2.65
+  Fixed problem with symbols creation in Makefile.am which was assuming that
+    all versions of cpp write to standard output by default (Martin Banky). The
+    bug was introduced in libpng-1.2.9beta5.
+
+version 1.4.5beta03 [October 8, 2010]
   Wrapped long lines in CMakeLists.txt and introduced ${libpng_public_hdrs}
+  Undid Makefile.am revision of 1.4.5beta02.
+
+version 1.4.5beta04 [November 8, 2010]
   Check for out-of-range text compression mode in png_set_text().
+
+version 1.4.5rc01 [November 19, 2010]
+  No changes.
+
+version 1.4.5beta05 [December 27, 2010]
   Removed some extraneous parentheses that appeared in pngrutil.c of
-    libpng-1.4.3
+    libpng-1.4.3beta01
   Revised png_get_uint_32, png_get_int_32, png_get_uint_16 (Cosmin)
   Moved reading of file signature into png_read_sig (Cosmin)
   Fixed atomicity of chunk header serialization (Cosmin)
   Added test for io_state in pngtest.c (Cosmin)
   Added "#!/bin/sh" at the top of contrib/pngminim/*/gather.sh scripts.
+
+version 1.4.5beta06 [November 21, 2010]
+  Restored the parentheses in pngrutil.c; they are needed when the
+    png_get_*int_*() functions are compiled (i.e., when PNG_USE_READ_MACROS
+    is not defined).
+  Make the "png_get_uint_16" macro return a png_uint_32 in libpng-1.4 for API
+    compatibility.
   Changes to remove gcc warnings (John Bowler)
     Certain optional gcc warning flags resulted in warnings in libpng code.
     With these changes only -Wconversion and -Wcast-qual cannot be turned on.
@@ -43,10 +69,22 @@ Changes since the last public release (1.4.4):
     smaller than (int) or (unsigned int)) and -Wcast-qual is not possible
     with pngwio.c and pngwutil.c because the 'write' callback and zlib
     compression both fail to declare their input buffers with 'const'.
-  Added comment about the potential API incompatibility of the
-    png_get_uint_16() macro with libpng-1.4.0 through 1.4.4.
+
+version 1.4.5beta07 [November 25, 2010]
+  Reverted png_get_uint_16 macro to beta05 and added comment about the
+    potential API incompatibility.
+
+version 1.4.5rc02 [December 2, 2010]
+  No changes.
+
+version 1.4.5rc03 [December 3, 2010]
+  Added missing vstudio/*/*.vcxproj files to the zip and 7z distributions.
+
+version 1.4.5 [December 9, 2010]
   Removed PNG_NO_WRITE_GAMMA from pngminim/encoder/pngusr.h
 
+version 1.4.5beta01 [December 27, 2010]
+
 Send comments/corrections/commendations to glennrp at users.sourceforge.net
 or to png-mng-implement at lists.sf.net (subscription required; visit
 https://lists.sourceforge.net/lists/listinfo/png-mng-implement).