test_rotor.py: New test of the rotor module.

test_*: converted to the new test harness.  GvR note!  test_signal.py
works interatively (i.e. when verbose=1) but does not work inside the
test harness.  It must be a timing issue, but I haven't figured it out
yet.

Lib/test/test_operator.py

@@ -2,6 +2,7 @@ import operator
 import sys
 
 def test(name, input, output, *args):
+    print 'testing:', name
     f = getattr(operator, name)
     params = (input,) + args
     try: