just figured out that the variables like AUTOPEAKRETAIL are in accessibility.csv

Easier to add the logsums than I thought it would be.

Also moved the standard methods into a new module - activitysim.py - will add unit tests and docstrings if we all think this is the right direction to be headed

Also added a global param to settings.yaml called household_sample_size to run with a subset of the total households when debugging
add the activitysim.py module too