Setup lib directory dependencies in Rakefile for Rubymotion

Rakefile

Motion::Project::App.setup do |app|
  # This will make sure that each *.rb file in your app/controllers, app/models and app/views
  # depends on all the *.rb files in your app/lib

  app_files = Dir.glob(File.join(app.project_dir, 'app/{controllers,models,views}/**/*.rb'))
  lib_files = Dir.glob(File.join(app.project_dir, 'app/lib/**/*.rb'))
  app.files_dependencies(app_files.inject({}){|h, f| h[f] = lib_files;h})
end