vchoi_fork

[svn-r2699] Purpose:
    Bug fix
Description:
    "Time" datatypes (H5T_UNIX_D*) were not being stored and retrieved in
    the datatype object header message correctly.
Solution:
    Store endian-ness and precision in the datatype object header message and
    added test to continue to track them working correctly.

    This fixes bug #512.

Platforms tested:
    FreeBSD 4.1.1 (hawkwind)