Top level agency ids propogated

[kuanb]

Put an agency ID in the GTFS Collection data frame. It has then an additional .agency frame that would keep the hash.

So at the very beginning when we start working on a new GTFS feed, we are going to need to generate_name and it can take the agency.txt file and whatever we have there are try and generate unique names with hashes as well ( in case there is a naming collision ). With these results, we always will refer to the resultant names in the rest of the cleaning process.