+ add translation for article->menu.
 * adjust the help menu.
 * add the id for book admin file.
 * add the updateOrder function.
 * adjust code.
 * adjust the article menu to directory.
 + add the getPairs function.
 * add order if type is help.
 * adjust the code.
 * adjust the code.
 * adjust the code.
 * adjust the read function.
 * adjust the admin function to add books in help moduleMenu.
 * adjust the style for read.
Merge branch 'master' of github.com:xirang/xirangeps

Conflicts:
	system/module/article/lang/zh-cn.php