Access Sinatra settings from a model
===

I have a modular Sinatra app. I'm setting some custom variables in my configure block and want to access these settings in my model.

The problem is, I get a `NoMethodError` when I try and access my custom settings from `MyModel`. Standard settings still seem to work fine though. How can I make this work? 

    # app.rb
    require_relative 'models/document'

    class App < Sinatra::Base
      configure do
        set :i_want_to_believe, '/xfiles/'
      end

      get '/' do
        @model = MyModel.new
        haml :index
      end
    end

    # models/my_model.rb
    class MyModel
      def initialize
        parse_belief
      end
      def parse_belief
        ...
        settings.i_want_to_believe # no method error
        ...
        settings.root # works fine
      end
    end