png.h, libpng.3, and libpng-*.txt.

comment about the potential API incompatibility.

for API compatibility.

png_get_*int_*() functions are compiled (i.e., when PNG_USE_READ_MACROS
is not defined).

and added test for io_state in pngtest.c (Cosmin)

libpng-1.4.3bet01

and introduced ${libpng_public_hdrs}

$AUTOHEADER, $AUTOPOINT, $ACLOCAL and $LIBTOOLIZE