Download script fixes #5  - node-csv-parser API change  - some agencies don't provide all files, ignore missing files
Download script fixes #5
 - node-csv-parser API change
 - some agencies don't provide all files, ignore missing files

BlinkTagInc/node-gtfs,brendannee/node-gtfs,BlinkTagInc/node-gtfs,BlinkTagInc/node-gtfs,CadillacJenkins/node-gtfs