old_contents: from pymatbridge import *
  from publish import *
  try:
      from matlab_magic import *
  except ImportError:
      pass
  
new_contents: from pymatbridge import *
  
  try:
      from publish import *
  except ImportError:
      pass
  
  try:
      from matlab_magic import *
  except ImportError:
      pass
  
subject: Fix #60: publish.py fails if IPython not installed