官网教程:
https://developer.apple.com/library/prerelease/content/documentation/LanguagesUtilities/Conceptual/iTunesConnect_Guide/Appendices/Properties.html#//apple_ref/doc/uid/TP40011225-CH26
iTunes Connect 教程
https://developer.apple.com/library/prerelease/content/documentation/DeveloperTools/Conceptual/cross_development/Configuring/configuring.html#//apple_ref/doc/uid/10000163i-CH1-107837
frameworks : SDK Compatibility Guide
Bundle教程
https://developer.apple.com/library/prerelease/content/documentation/StringsTextFonts/Conceptual/TextAndWebiPhoneOS/Introduction/Introduction.html#//apple_ref/doc/uid/TP40009542
Text编程指导
https://developer.apple.com/library/prerelease/content/documentation/Cocoa/Conceptual/TextLayout/TextLayout.html#//apple_ref/doc/uid/10000158i
Text layout编程指导
https://developer.apple.com/library/prerelease/content/documentation/AppleApplications/Conceptual/Dashboard_ProgTopics/Introduction/Introduction.html
https://developer.apple.com/library/prerelease/content/documentation/General/Conceptual/ExtensibilityPG/Action.html#//apple_ref/doc/uid/TP40014214-CH13-SW1
widget类
