Presentation extension is a Crosswalk extension which implements the W3C Presentation API: http://www.w3.org/TR/presentation-api/.
For hybrid application developers, the easiest way to integrate Cordova extension is using CocoaPods. For CocoaPods installation & usage, please refer to: https://cocoapods.org/
Add crosswalk-extension-presentation into your Podfile:
pod 'crosswalk-extension-presentation', '~> 1.1'
Then use 'pod install' to install pods and create the workspace for the project.
Contents TBD...