add serve method and requirements file
chopped unused files
chopped another unused file
script to fetch and parse gtfs data into json shapes and stops

- updated data now has MetroRail route that shows Leander stop
- issue #13
save version of last data fetched
don't fetch routes, that data file was chopped
don't pretty print the json, this form is not for humans
Merge pull request #14 from luqmaan/13-fix-metrorail-route

13 fix metrorail route