可直接复制粘贴的boostrap图标库网址
1:http://fontawesome.dashgame.com/
2:http://www.kuiyu.net/art-34.html
3:http://www.bootcss.com/p/font-awesome/design.html
4:http://www.bootcss.com/p/font-awesome/
5:http://v3.bootcss.com/components/
6:https://www.elegantthemes.com/blog/resources/elegant-icon-font