Added TODO List and a utility to convert a GTFS folder to a Pandas

Dataframe and check the validity of the feed.

bin/f2py

@@ -0,0 +1,8 @@
+#!/home/johannes/code/transport-accessibility/bin/python
+# -*- coding: utf-8 -*-
+import re
+import sys
+from numpy.f2py.f2py2e import main
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())