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 
If this docstring is supposed to be for the module, put it at the very top of the file. If it's supposed to be for the function, put it under. the function header.

python has well defined rules for what a docstring applies to, and various tools (pydoc, the interpreter's help() function...) will take advantage of this.