Update copyright for public release

Fix a typo in previous copyright notices and update copyright to
protect/preserve I/O performance and UT-Battelle copyrights.
Fix typo in copyright notice

Correct year from 23 to 2013.
Copyright updates

This should be the complete set of copyright updates for all
of XDD.  This preserves/protects the copy rights to the XDD
source for I/O performance and UT-Battelle.