Added bigger pool for random seeds, now with a 9 * 10e-07 % of chance of appearing, also added test to cover edge cases (case in fact, the coincidence of the seeds it's correct)

Conflicts:
	app/controllers/budgets/investments_controller.rb

app/controllers/budgets/investments_controller.rb

@@ -95,7 +95,7 @@ module Budgets
 
       def set_random_seed
         if params[:order] == 'random' || params[:order].blank?
-          seed = rand(-100..100) / 100.0
+          seed = params[:random_seed] || session[:random_seed] || rand(-100000..100000)
           params[:random_seed] ||= Float(seed) rescue 0
         else
           params[:random_seed] = nil