podlators 4.03

There was a bug in the test suite of the last few versions of podlators that caused the test for devising dates to fail if POD_MAN_DATE or SOURCE_DATE_EPOCH were already set. Since I needed to fix that anyway, I decided to poke at the test suite some more, and made some good progress towards refactoring it, breaking out common code, and making it easier to add new tests. It's still in the stage where I've added more code than I've removed, but a lot of that is comments and the new code is much better.

It was tempting to keep going until I'd refactored the whole test suite, but that's how I go too long between releases, so here, have another small release. The only changes are in the test suite, not in the code.

You can get the latest version from the podlators distribution page.