Merge pull request #835 from punchagan/tab_pagedown

Add Tab key to list of keys that scroll down the paging widget.

IPython/frontend/qt/console/console_widget.py

@@ -1265,7 +1265,8 b' class ConsoleWidget(LoggingConfigurable, QtGui.QWidget):'
                 self.layout().setCurrentWidget(self._control)
             return True
 
-        elif key in (QtCore.Qt.Key_Enter, QtCore.Qt.Key_Return):
+        elif key in (QtCore.Qt.Key_Enter, QtCore.Qt.Key_Return,
+                     QtCore.Qt.Key_Tab):
             new_event = QtGui.QKeyEvent(QtCore.QEvent.KeyPress,
                                         QtCore.Qt.Key_PageDown,
                                         QtCore.Qt.NoModifier)