1) Check for valid object header version for a refcount messge
2) Check for invalid fill value size
3) Check for invalid dimension size in a layout message
4) Add --enable-error-stack option to h5stat
5) Add error checks to h5stat.c
6) Add tests to h5stat and h5dump
and replace it with new url for COPYING file.
Fix 2 lines in java error test expected output file where messages
include line numbers changed by reducing the copyright header by 2
lines.
