Update getiban script
Update getiban script

This switches to use the csv module to support multi-line column values.
This also handles some problems in the BBAN structure column that would
contain an IBAN structure.

tonyseek/python-stdnum,arthurdejong/python-stdnum,arthurdejong/python-stdnum,holvi/python-stdnum,holvi/python-stdnum,dchoruzy/python-stdnum,t0mk/python-stdnum,arthurdejong/python-stdnum,holvi/python-stdnum