Update sample code to iOS SDK 4.2.2.

Update Sample Code to iOS SDK 4.2.1.

Update sample and documentations to iOS SDK 4.2.

Update Sample Code to iOS SDK 4.1.1.

Update Sample to iOS SDK 4.1.

Update to iOS SDK 4.0.1.

add swift-version file.

Update Github Sample to iOS SDK 3.5.1.

Update Sample Code and API Docs to SDK 3.5.

update podspec file