Added silent timer support to pyevent hub, upgraded api_test to use actual unit test primitives rather than inventing its own.

eventlet/hubs/pyevent.py

@@ -96,6 +96,7 @@ class Hub(BaseHub):
                     self.schedule_call_global(0, api.getcurrent().parent.throw, *self.signal_exc_info)
                     self.signal_exc_info = None
                 else:
+                    if not self.silent_timer_exceptions:
                         traceback.print_exc()
 
     def abort(self):

tests/api_test.py

@@ -210,12 +210,12 @@ class TestApi(TestCase):
             state.append('finished')
         g = api.spawn(test)
         api.sleep(DELAY/2)
-        assert state == ['start'], state
+        self.assertEquals(state, ['start'])
         api.kill(g)
         # will not get there, unless switching is explicitly scheduled by kill
-        assert state == ['start', 'except'], state
+        self.assertEquals(state,['start', 'except'])
         api.sleep(DELAY)
-        assert state == ['start', 'except', 'finished'], state
+        self.assertEquals(state, ['start', 'except', 'finished'])
 
     def test_nested_with_timeout(self):
         def func():