Writing MassDOT data feeds locally

changes that I am working on:
  - reading URL's and feednames from a configuration file, instead of hardcoding these for each feed
  - removing script 'collectData.sh'; using only store.py to continuously pull the data

this version shows data being pulled only from the 'travelTimes' feed.

@zenhack, @gsilvis, @lokI8, @ryabouza  
this issue was something we needed to talk about at some point.. if cron job seems to be the way to go about it, I'll work on that as well.