Pack files now allow README.md

This lets us have a single README file across GitHub and pack files.
A t/no_names.pl test now passes

I made poor notes about this test last time and don't remember why I
had this todo test in here.  It certainly doesn't cover the "tests
with no name" category.  The test passes and the "TODO test passed"
message made me think something was wrong, adjust the test to expect
it to pass.
Replace call_det/2 with call_ending/2

This handles tests that throw exceptions.  Before this change, a test
that threw an exception caused TAP output to loop infinitely (that's
what happens when a toplevel goal throws an exception).
Support tests that throw an exception
Bump version