iOS: pull refresh table view - EGOTableViewPullRefresh

http://wangjun.easymorse.com/?p=1193

http://blog.csdn.net/w59879213/article/details/7165236

注意事项：

* 使用EGOTableViewPullRefresh需要将QuartzCore.framework lib加入到你的project里

* EGOTableViewPullRefresh没有做arc version，你需要为其.m file加上“-fno-objc-arc”

other lib

https://github.com/leah/PullToRefresh

http://www.cocoachina.com/bbs/read.php?tid=90232&page=1

http://www.waterworld.com.hk/zh-hant/blog/pull-down-refresh-table-view

http://blog.leahculver.com/2010/12/iphone-pull-to-refresh.html