Fix import_ch_zurich.py to handle small change in vbz data, FRT_FID is no longer unique.
Fix import_ch_zurich.py to handle small change in vbz data, FRT_FID is no longer unique.

galvinford/transitfeed,Censio/transitfeed,avilaton/transitfeed,avilaton/transitfeed,bileto/transitfeed,google/transitfeed,avilaton/transitfeed,zarnold/transitfeed,Censio/transitfeed,zarnold/transitfeed,galvinford/transitfeed,galvinford/transitfeed,google/transitfeed,Censio/transitfeed,bileto/transitfeed,bileto/transitfeed,google/transitfeed,digideskio/transitfeed,digideskio/transitfeed,zarnold/transitfeed,digideskio/transitfeed