Convert :attributes tags to :meta tags.

lib/jsduck/accessors.rb

lib/jsduck/aggregator.rb

lib/jsduck/app_exporter.rb

lib/jsduck/class.rb

lib/jsduck/class_formatter.rb

lib/jsduck/doc_formatter.rb

lib/jsduck/doc_parser.rb

lib/jsduck/inherit_doc.rb

lib/jsduck/merger.rb

lib/jsduck/meta_tag.rb

lib/jsduck/meta_tag_loader.rb

lib/jsduck/renderer.rb

lib/jsduck/source_file.rb

lib/jsduck/tag/abstract.rb

lib/jsduck/tag/deprecated.rb

lib/jsduck/tag/protected.rb

lib/jsduck/tag/readonly.rb

lib/jsduck/tag/required.rb

lib/jsduck/tag/static.rb

lib/jsduck/tag/template.rb