def default_extension_paths
      env = ENV["RAILS_ENV"] || Rails.env
      paths = [Rails.root + 'vendor/extensions']
      paths.unshift(RADIANT_ROOT + "vendor/extensions") unless Rails.root == RADIANT_ROOT
      paths.unshift(RADIANT_ROOT + "test/fixtures/extensions") if env == "test"
      paths
    end
def default_extension_paths
      env = ENV["RAILS_ENV"] || Rails.env
      paths = [Rails.root + 'vendor/extensions']
      paths.unshift(RADIANT_ROOT + "vendor/extensions") unless Rails.root == RADIANT_ROOT
      paths.unshift(RADIANT_ROOT + "test/fixtures/extensions") if env == "test"
      paths
    end
Sets the locations in which we look for vendored extensions. Normally:
   Rails.root/vendor/extensions
   RADIANT_ROOT/vendor/extensions
 There are no vendor/* directories in +RADIANT_ROOT+ any more but the possibility remains for compatibility reasons.
 In test mode we also add a fixtures path for testing the extension loader.