Add support for HAFAS datasets
We should allow HAFAS data to be used in the osmPti2mmds tool. A great start for this could be the github repo at: https://github.com/skinkie/hafasreader
We should allow HAFAS data to be used in the osmPti2mmds tool. A great start for this could be the github repo at: https://github.com/skinkie/hafasreader