User location

[andersoncardoso]

• Add postgis

need to recreate the DB.. see new db settings on database.yaml.sample

• add location column to user
• GeoJSON module:

GeoJSON::encode user.location
GeoJSON::encode user.location, user.id, user.geojson_properties

GeoJSON.parse geojson  # => RGeo object
GeoJSON.parse geojson, :to => :wkt  # output WKT string

• Geometry

class MyModel
   include Geometry

  geojson_field :location  # adds location_geojson method, and handle factories

  def geojson_properties # to define feature properties on the geojson
    {:name => name, :image => "url" }
  end
end

• Improves overlay component:

<div data-components="overlay" data-overlay="<%= {:style => "dark", :message => t('some.message') } %>"
# created a dark overlay with a centered message

• Show user location on users#show