box Plugin

语法： 

<box> the box contents </box>
the box contents 
<box 80% round orange|a title> the box contents</box>
<box 50% left blue>the box contents</box|a caption>
<box 60% round #f99 #fc9 #fcc #f60|title>the box contents</box|caption>

a title

the box contents
the box contents

a caption

title

the box contents

caption

<box width classes colours | title text> contents text </box>

title text

contents text