unique switch of aboutus

Conflicts:
	aboutus.php
	conf/config.auth.php
modify aboutus in cmsadmin for unique cate default display style
switch of au_cate_input display or not

Conflicts:
	conf/config.auth.php
若有設定au_cate，則後台aboutus就顯示類別

Conflicts:
	cmsadmin/templates/ws-manage-aboutus-list-tpl.html
aboutus啟用au_cate時，後台列表顯示分類清單

Conflicts:
	cmsadmin/aboutus.php
增加aboutus subcate

Conflicts:
	conf/config.auth.php

Conflicts:
	aboutus.php
	conf/config.auth.php
	templates/ws-fn-common-js-tpl.html
關於我們左選單套au_subcate別名

Conflicts:
	class/leftmenu/aboutus.php
rewrite aboutus

Conflicts:
	aboutus.php
調整abouus
啟用au_cate
設定前台au_cate: promise
設定非關於我們的tag_layer
增加mainfunc::mk_link
update from server@eng
Merge branch 'eng.local' into eng
update from server@cht
Merge branch 'eng' into cht

Conflicts:
	lang/cht-utf8.php
設定au_cate:企業承諾