def create_initialize(repo, atts)
      @repo = repo
      atts.each do |k, v|
        instance_variable_set("@#{k}".to_sym, v)
      end
      self
    end
def create_initialize(repo, atts)
      @repo = repo
      atts.each do |k, v|
        instance_variable_set("@#{k}".to_sym, v)
      end
      self
    end
Initializer for Submodule.create
   +repo+ is the Repo
   +atts+ is a Hash of instance variable data

 Returns Grit::Submodule