This PR is motivated by the changes in the presence of calendar and _calendardates files in the GTFS. According to the GTFS documentation, calendar.txt is optional if all service dates are available in _calendardates.txt, and _calendardates.txt is optional if calendar.txt exists. Currently, AequilibraE requires calendar.txt file for feed import.
In this PR we:
modified the requirement of calendar and _calendardates files
modified the import of services to consider imports from both calendar files
This PR is motivated by the changes in the presence of calendar and _calendardates files in the GTFS. According to the GTFS documentation, calendar.txt is optional if all service dates are available in _calendardates.txt, and _calendardates.txt is optional if calendar.txt exists. Currently, AequilibraE requires calendar.txt file for feed import.
In this PR we: