Multiple destinations per agents now possible (#23)
New vignette introducing the concept of an 'activity model' with abstr & A/B Street (#76)
New vignette to reproduce cycle potential with the Propensity to Cycle Tool (PCT) & A/B Street (#67)
New open travel data for São Paulo (#70)
Organise first abstr hackathon (#69)
ab_time_normal upstream() fix (#31)