Log Message:
Update to 1.06
Add LICENSE

Upstream changes:
1.06    Fri Oct 19 11:30:31 CDT 2012
        [ENHANCEMENTS]
        tainted() now localizes $SIG{__DIE__} before performing the
        taint check.  If the calling program has its own $SIG{__DIE__},
        we don't want to use it.  Thanks, Pete Krawczyk.
        https://rt.cpan.org/Ticket/Display.html?id=23507

        [FIXES]
        Checks for undef before opening files when trying to create
        some taint. Thanks Fr茅d茅ric Buclin.
        https://rt.cpan.org/Ticket/Display.html?id=51246