39: updated version changes documentation
39: updated version changes documentation

Task-Url: https://github.com/LorenzoBettini/packtpub-xtext-book-2nd-examples/issues/39
LorenzoBettini/packtpub-xtext-book-2nd-examples,LorenzoBettini/packtpub-xtext-book-2nd-examples,LorenzoBettini/packtpub-xtext-book-2nd-examples,LorenzoBettini/packtpub-xtext-book-2nd-examples