Add support for commas in portal names

[marijnvdwerf]

Lines like "Het Leven, De Wietel",51323152,5978139 used to crash the script. This was solved by using the python csv module, instead of simply splitting a string at every comma.

Issue previously caused:

Traceback (most recent call last):
  File "makePlan.py", line 215, in <module>
    sys.exit(main())
  File "makePlan.py", line 102, in main
    locs.append( np.array(parts[1:3],dtype=int) )
ValueError: invalid literal for long() with base 10: ' De Wietel"'