添加高度自适应的oocss

Author: xjchenhao

src/oocss.styl

@@ -19,6 +19,7 @@ $oocss($is-mobile=false){
   .f_l{float:left !important;}
   .f_r{float:right !important;}
   .w_a{width:auto !important;}
+  .h_a{height:auto !important;}
   .t_a_c{text-align:center !important;}
   .t_a_l{text-align:left !important;}
   .t_a_r{text-align:right !important;}