Mostly cleaned-up implementation, including some small issues in expressions based on SEMCOG project feedback
Working on example distribution system for including a more comprehensive set of examples with activitysim. This is needed for estimation mode since we can't distribute a mini example and get reasonable estimation results. Asim will add a command-line option to download various example sets, including the full data, into a user-specified directory that is fully configured and runnable out of the box.
Plan to update notebook with complete start to finish example