修改Lib路径；修改Bundle设置。
添加课件更新通知
修改课件修改后的刷新逻辑
track a file in the xcode project file
Merge branch 'master' of https://github.com/Kevin-Perkins/xiaoyudi_iOS into Kevin-Perkins-master

Conflicts:
	iosapp.xcodeproj/project.pbxproj