* adjust parseURI, createBookBrowse, createBookRead function.
 * adjust code format.
 * adjust read function.
 + add up and down funcion for sort.
 * add js for sort.
 * adjust create.
 + add translation.
 + add getPreAndNext function.
 + separate getBookCatalogue to getFrontCatalogue and getAdminCatalogue.
 * adjust create function.
 * adjust code.
 * add alias and keywords fields.
 * adjust code.
 * adjust printBook function.
Merge branch 'master' of github.com:xirang/chanzhieps

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