Addresses #150. Null activity values no longer match filters. Needs testing with real data.
Addresses #150. Null activity values no longer match filters. Needs testing with real data.

trevorackerman/trailsy,trevorackerman/trailsy,vinh3928/trailsy,CodeForBoulder/trailsy,mbarrenecheajr/trailsy,CodeForBoulder/trailsy,vinh3928/trailsy,mgraesser/trailsy,remory08/trailsy,mbarrenecheajr/trailsy,JamesGould123/trailsy,JamesGould123/trailsy,remory08/trailsy,mgraesser/trailsy