Add tool to generate travel-time maps. Separated from misc_tools.py
Remove code deprecated by addition of 'generate_station_tt_map' tool.
Make algorithm a function to be imported and called by main script.
Add main() wrapper for command line execution.
Add parameter file.
Add some new classes and deprecate old ones.
Make a few changes for testing.
Ignore some automatically generated files.
Add a short script to display some properties of _Event class.
Merge pull request #1 from malcolmw/master

Pull my finger