As Foursquare spelunks down the discovery rabbit hole, the company’s check-in app, Swarm, gets more social. Today Foursquare announced that Swarm has been updated with one-to-one and group messaging on iOS and Android. This update furthers Foursquare’s secondary goal of connecting you with friends nearby — a thesis that hasn’t proved wildly successful for Swarm (on iOS or Android, when you look at overall […]