Notify blame parties

[pmatos]

As Martin Sebor suggested in the mailing list:

The regression and the testresults lists are useful but not nearly
as much as they could be. For one, the presentation isn't user
friendly (a matrix view would be much more informative). But even
beyond it, rather than using the pull model (people have to make
an effort to search it for results of their changes or the changes
of others to find regressions), the regression testing setup could
be improved by adopting the push model and automatically emailing
authors of changes that caused regressions (or opening bugs, or
whatever else might get our attention).

So committers, authors and possibly the dev. list should be notified of any breaks on build or testsuite.