Passes all the tests that the default reactor does.

The key was making test_internet work (thanks therve).  It exposed a
key problem with order dependencies for delayed calls vs. IO.  Now, it
runs correctly, just in 475s vs 190s for the select reactor.  Need to
figure out just why that is...

qt4reactor.py

@@ -178,8 +178,8 @@ def iterate(self,delay=0.0):
             if delay == 0.0:
                 self.reactorInvokePrivate()
                 self._timer.stop()
-                self.qApp.processEvents()
-                self._timer.start()
+                #self.qApp.processEvents()
+                #self._timer.start()
             else:
                 endTime = delay + time.time()
                 self.reactorInvokePrivate()
@@ -221,10 +221,10 @@ def reactorInvokePrivate(self):
             self._blockApp.quit()
         self._doSomethingCount += 1
         self.runUntilCurrent()
-        #self.qApp.processEvents()
         t = self.timeout()
         if t is None: t=0.1
         else: t = min(t,0.1)
+        self.qApp.processEvents()
         self._timer.start(t*1010)
 
     def doIteration(self):