setup.py doesn't install transition icons

At r527, transition icons were moved from icons/ to icons/small/ and icons/medium/, but setup.py isn't changed yet. So, setup.py cannot install these icons and an error occurs when I click "Transitions" tab:

Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.7/openshot/windows/MainGTK.py", line 518, in on_nbFiles_switch_page
    self.OSIcvTransitions = IcvTransitions.OpenShotTree(self.icvTransitions, self.project)
  File "/usr/lib/pymodules/python2.7/openshot/windows/IcvTransitions.py", line 48, in __init__
    self.populate()
  File "/usr/lib/pymodules/python2.7/openshot/windows/IcvTransitions.py", line 75, in populate
    pbThumb = gtk.gdk.pixbuf_new_from_file(file_path)
glib.GError: Failed to open file '/usr/lib/pymodules/python2.7/openshot/transitions/icons/medium/sand.png': No such file or directory

Tested r546 on Ubuntu 11.04 amd64.