Localized exceptions still failing in perl < 5.14 if the
pureperl deferred backend in use.  The choice here is
between not localizing at all and having the user choose
a Deferred backend. I think this is the better choice
so have skipped the PP exception tests on < 5.14
Merge pull request #20 from clintongormley/master

Localized exceptions still failing in perl < 5.14 if the