Add ExampleUsingPropertyData which, similar to Example, is a "synonym" o...

NB: This is my very first contribution to an open source project and it is the very first time that I am using a pull request. I'd be grateful if you could ensure that I haven't messed anything up. I've followed the instructions that you've provided as part of "Contributing.md". 

I have implemented a synonym for "PropertyData" which I have named "ExampleUsingPropertyData". I've done a copy and paste job based upon the ExampleAtttribute.