Update README.md
添加SB的使用Demo
添加下啦刷新组件进行测试下啦刷新的bug
添加设置当前可见页码的功能
update XHTwitterPaggingViewer.podspec v0.2
removed styling and adjusting scrollview insets
Resolve bug where XHTwitterPaggingViewer was incorrect height when inside a UITabBarController
Set tag on labels so they can be recycled properly
Merge pull request #2 from duncandee/master

removed styling and adjusting scrollview insets
Merge pull request #4 from jordanmaguire/bug_fix/label_tags

Set tag on labels so they can be recycled properly
Merge pull request #3 from jordanmaguire/bug_fix/scroll_view

Resolve bug where XHTwitterPaggingViewer was incorrect height when inside a UITabBarController
update XHTwitterPaggingViewer.podspec 0.3
Call viewWillDisappear and viewWillAppear when scrolling to and away from view controllers
Also call viewDidAppear and viewDidDisappear
修复导航栏Title颜色跟系统配置一致
Merge pull request #5 from jordanmaguire/feature/call_ui_view_controller_callbacks

Call viewWillDisappear and viewWillAppear when scrolling to and away from view controllers
Merge pull request #6 from lerosua/master

修复导航栏Title颜色跟系统配置一致
Call viewWillDisappear and viewWillAppear when scrolling to and away from view controllers
Also call viewDidAppear and viewDidDisappear
update podspec to 0.4