rampage against automake: move aux dir

The new test-driver stuff that lands in the top level is rage inducing
when it comes to tab completion.  Move it aside!
add ph_stm_copy()

Another one that I always end up wanting/needing.

Also: tweak the test harness to make it clearer when the plan is messed
up by colorizing things... and also have it detect bogus printf
formatting.