title: Deleting lines from wx.TextCtrl
body: <p>I am using a wx.TextCtrl to output text from a network daemon.<br />
  As the output is quite verbose, the size of text in the TextCtrl can become huge (BTW is there any limitation on the size of the contents of a TextCtrl?)<br />
  I would like to delete the top N lines from the TextCtrl when TextCtrl.GetNumberOfLines() exceeds a predefined treshold.
  What is the best way to accomplish this?</p>