def register_storage
      %w[couchdb mongodb redis sql].each do |backend|
        begin
          require 'vines/storage/%s' % backend
        rescue LoadError
          # do nothing
        end
      end
    end
def register_storage
      %w[couchdb mongodb redis sql].each do |backend|
        begin
          require 'vines/storage/%s' % backend
        rescue LoadError
          # do nothing
        end
      end
    end
Try to load various storage backends provided by vines-* gems and register
 them with the storage system for the config file to use.

 Returns nothing.