Update startup banner

I'm updating the startup banner to reflect the changes I've made to the
program, update copyright notices, and to remove unnecessary contact
information and result submission instructions (the email address does
not work). I'm also fixing a typo in one of the code comments.
Remove HINT wordmark from banner

The HINT wordmark is trademarked. To avoid legal issues, it has been
removed from the program. The wordmark will remain in the README.txt
file for the time being as it is unmodified from the original.
Rename as the HI64 System Benchmark

As I plan to make major improvements to the code, I am now calling the
program the HI64 System Benchmark (Hierarchical Integration 64-Bit) to
avoid legal problems caused by the use of the "HINT" trademark. Although
I have updated the startup banner to reflect the new name, I intend to
continue to attribute the original authors.

The version number has been reset to 0.1.0 and a change log has been
added.

Old files not applicable to this version have been moved to a new
subdirectory "old-files".