Relocate example test files into the test/ tree.
I don't generate actions.log files anymore.
Pull in modern auto-compilation support.
Make the limit parameter to prepare-hangman optional so that the
instructions at the top of the file remain accurate.
Make hangman working directory independent.
Test alternate schedulers.  Turns out I was forgetting to load the
binary heap data structure.
Migrate supporting data structures to the support/ directory.
Integrate binary heaps.
Suppress loading messages when changing implementations for testing.
Turn off per-user init files when running tests.
These files belong in the test directory also.