Fix test failures in POD tests
Cope gracefully with a missing test dependency

https://rt.cpan.org/Ticket/Display.html?id=71771 describes how tests
fail without HTML::Parser installed.
small rewrite of the HTML::Parser check
Documentation fix

https://rt.cpan.org/Ticket/Display.html?id=77685 describes this problem.
documentation update

- add L<> around module names to increase linkage
- update copyright dates (OMG ten years!)
- add a few C<> here and there