Move builtin meta-tags to tag/ dir.

require "jsduck/meta_tag"

require 'jsduck/author_tag'

require 'jsduck/doc_author_tag'

require 'jsduck/tag/author'

require 'jsduck/tag/docauthor'

module JsDuck

require "jsduck/meta_tag"

module JsDuck

module JsDuck::Tag

  # Implementation of hidden @author tag

  class AuthorTag < MetaTag

  class Author < JsDuck::MetaTag

    def initialize

      @name = "author"

    end

require "jsduck/meta_tag"

module JsDuck

module JsDuck::Tag

  # Implementation of hidden @docauthor tag

  class DocAuthorTag < MetaTag

  class Docauthor < JsDuck::MetaTag

    def initialize

      @name = "docauthor"

    end