modified:   crawlers/dsl.txt
	modified:   crawlers/pixiv/gui.rbw
	modified:   crawlers/pixiv/parallel_cralwler.rb
	新規ファイル: crawlers/scripts/load_history.rb
	modified:   crawlers/scripts/save_history.rb
	modified:   crawlers/scripts/view_in_pixiv.rb
	renamed:    crawlers/pixiv/image_store.rb -> crawlers/strages/image_store.rb
	新規ファイル: crawlers/strages/image_viewer.rb
	modified:   my_lib/mtk/concurrent/thread_pool/half_pool.rb
	modified:   my_lib/mtk/environment.rb
	modified:   my_lib/my/external_command.rb