widget大全：
many2many_tags
one2many_list
selection
progressbar
selection
statusbar
handle
monetary
mail_thread
statinfo
contact
html
mail_followers
url
radio
email
one2many
many2manyattendee
priority
integer
sparkline_bar
many2many_binary
image
many2many_kanban
char_domain
gauge
float_time
原文：http://blog.sina.com.cn/s/blog_729a47890102wflz.html