[libpng12] Removed WRITE_WEIGHTED_FILTERED code, reformatted LICENSE.

CHANGES

@@ -469,7 +469,7 @@ version 1.0.3d [September 4, 1999]
   Added new png_expand functions to scripts/pngdef.pas and pngos2.def
   Added a demo read_user_transform_fn that examines the row filters in pngtest.c
 
-version 1.0.4 [September 24, 1999]
+Version 1.0.4 [September 24, 1999, not distributed publicly]
   Define PNG_ALWAYS_EXTERN in pngconf.h if __STDC__ is defined
   Delete #define PNG_INTERNAL and include "png.h" from pngasmrd.h
   Made several minor corrections to pngtest.c
@@ -493,6 +493,7 @@ version 1.0.4c [October 1, 1999]
   Added a "png_check_version" function in png.c and pngtest.c that will generate
     a helpful compiler error if an old png.h is found in the search path.
   Changed type of png_user_transform_depth|channels from int to png_byte.
+  Added "Libpng is OSI Certified Open Source Software" statement to png.h
 version 1.0.4d [October 6, 1999]
   Changed 0.45 to 0.45455 in png_set_sRGB()
   Removed unused PLTE entries from pngnow.png
@@ -2857,12 +2858,13 @@ version 1.2.53rc02 [February 21, 2015]
 versions 1.0.63 and 1.2.53 [February 26, 2015]
   No changes.
 
-version 1.2.54beta01 [May 15, 2015]
+version 1.2.54beta01 [July 13, 2015]
   Fixed typecast in a png_debug2() statement in png_set_text_2() to
     avoid a compiler warning in PNG_DEBUG builds.
   Fixed printf formats in pngtest.c to avoid compiler warnings and a
     Coverity warning in PNG_DEBUG builds.
   Avoid Coverity issue 80858 (REVERSE NULL) in pngtest.c PNG_DEBUG builds.
+  Removed WRITE_WEIGHTED_FILTERED code.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit