An example in for Swift and fixes for documentation broken links?

[grantkemp]

Hi
I noticed that the current project has some current broken links to documentation and is missing a sample project for Swift. Am I ok to contribute both above? or do you have someone doing it already.

Thank your for this project - it has helped my learning a lot!

Thanks

[grantkemp]

Pull request for above is here:
Thanks for your work to create this project it really helped me to understand things in a great more detail.
#61