Add Budgets Stats Controller, route and ability on reviewing ballots and finished budget

app/controllers/budgets/stats_controller.rb

@@ -0,0 +1,18 @@
+module Budgets
+  class StatsController < ApplicationController
+
+    load_and_authorize_resource :budget
+
+    def show
+      authorize! :read_stats, @budget
+      @stats = load_stats
+    end
+
+    private
+
+      def load_stats
+        Budget::Stats.new(@budget).generate
+      end
+
+  end
+end