Add Facebook Omniauth + Koala Gem

Add bson initializer to fix incompatibility with Mongoid and Omniauth. Add SessionsController to get omniauth token
Add facbook photos

Embed photos in user model. Get photos using Koala Facebook Graph. Save photo location data to database.
Update database seed file

Country data is now seeded with updated geojson data. Each country has additional info, which may be useful in the future. Currently only the country name, geo data, and country code are saved in the db.

Update dev database port to default 27017.
Add user model relationships: score and country

Score is embedded in User. A user's visited countries are embedded in model.

Remove location model. Photo model now holds latitude and longitude. May have to rename Photo model when other location user data is sourced from Facebook and other services.
Add Score calcuation functionality

Add score routes. Add score index view with link to new score action. Add locationparser model responsible for getting user photos from facebook and finding the associated countries. Add scorecalculator model responsible for calculating the percentage of countries visited.
Add js assets for score functionality

Add facebook login js file.
Add scorecontroller. Currently responsible for new score link listener
Merge pull request #1 from zkarst/configure-facebook

Working Facebook photo integration
Gets photo geo data and identifies country from coordinates. Returns a score with percentage of countries visited and countries name.