Merge pull request #54 from GraziaCiraulo/master

Remove unused variable (CID 13038)
Merge pull request #55 from GraziaCiraulo/master

Remove several "Dead local store" errors in BitSet64 class.
Fix logging message about WB
Remove useless if statement

Now that IF() cannot alter the CPU status anymore, it's useless to check if
the status is not stopping in that piece of code.
Remove test main() method in Register.java