Fixing readline import in ipy_greedycompleter.py

IPython/Extensions/ipy_greedycompleter.py

@@ -66,7 +66,7 b' def attr_matches(self, text):'
     return res
 
 def main():
-    import readline
+    import IPython.rlineimpl as readline
     readline.set_completer_delims(" \n\t")
     # monkeypatch - the code will be folded to normal completer later on
     import IPython.completer