Refactor double negation away
Kraken: add missing stop area in GTFS

change gtfs parser behavior for stop point without stop area. Create a
stop area in those case even if other stop areas were provided
GTFS: handling of slashs

TODO, work in progress to handle slashes in gtfs
GTFS: add test for the slashes in the gtfs

but the test is not working for the moment, we need to fix the slashes
bug and uncomment the test
Gtfs: correction of a huge mistake
Gtfs: Fix duration fields

the duration field was not read for the GTFS parser
Gtfs: change connection transfers time handling

GTFS min_transfers_time already add tolerance for robustness, no need to
add some more (but we still do the difference duration/display_duration
to be abble to display the buffer while reading data from fusio)
Merge pull request #322 from antoine-de/fix_gtfs

Fix gtfs