XCode打包腳本

配置之後，執行上面的腳本就會在.xcodeproject目錄下生成debug、release的ipa

本文參考：

<a href="http://shineonly.iteye.com/blog/2146410" target="_blank">Xcode 6.1下使用xcodebuild出錯</a>

<a href="http://stackoverflow.com/questions/25678372/xcodebuild-cant-build-when-no-physical-ios" target="_blank">xcodebuild can't build when no physical iOS</a>

<a href="https://github.com/stuartervine/xcode-sh" target="_blank">xcode-sh</a>