Matts branch

Only changes to VibeHelper are relevant, adding "foursquare_ll" method to pull data from Foursquare API given a lat long in the str format "##.#####...,###.###...".  We also need to include:
- gem 'foursquare2'
- gem 'geocoder'
- "include VibeHelper" in Vibe controller

I still need to test the functionality.