* Fixed bug with "PNG_ROWBYTES" usage, introduced in version 1.6.1.
The bug could cause a crash and only affects the "nolib" builds.
* Converted C++ style (// ...) comments to C style (/* ... */).
* Defined TOO_FAR == 32767 in deflate.c (again). The definition was omitted
from version 1.6.0 when zlib was upgraded to version 1.2.3.
Changes 1.6.1:
* Copied non-exported libpng functions from libpng into pngcrush, to make
pngcrush play more nicely with shared libpng. These are ifdef'ed out when
a static library is being built with the bundled libpng and pngcrush.h is
included.
Changes 1.6.0:
* Moved ChangeLog out of pngcrush.c comments and into a separate file.
* Filtered pngcrush.c through "indent -kr" and "expand" for readability.
* Moved 550 lines of usage/help/copyright/license/version info to separate
function(s) and cleaned up significantly.
* Added some comments for ease of navigation and readability.
* Stripped out a bunch of ancient-libpng compatibility stuff.
* Defined PNG_UINT_* macros (pngcrush.h for now).
* Fixed unknown-chunk handling ("-rem alla" and "-rem gifx" now work).
* Created modified version of makefile that supports external zlib.
* Added support for methods using Z_RLE zlib strategy (zlib 1.2.x only).
* Documented -huffman option in usage screen.
* Added IDAT statistics to final per-file summary.
* Added utime() support to give output files same timestamps as input files.
