Revision history for Signals-XSIG

0.04    2010-10-28
        Implement S::X::TieArray->{start} attribute to (1) save memory and
        (2) make it easier to distinguish "pre-handlers" and "post-handlers".

0.03    2010-10-24
        Removed %REGISTRY refs.

0.02    2010-10-08
        Introduces %XSIG.
        Added defaul signal behaviors for solaris.

0.01    Tie %SIG, use signal handler registry to implement multiple
        signal handlers.