Fix book Exploring CQRS and Event Sourcing (EbookFoundation#5448)

- Add authors
- Move from redirect link to redirect link
- Provide download links too.

Partial fixes EbookFoundation#5063

Author: davorpa

books/free-programming-books.md

@@ -880,7 +880,7 @@ Kerridge (PDF) (email address *requested*, not required)
 * [Developing Reactive Microservices](https://info.lightbend.com/COLL-20XX-Developing-Reactive-Microservices_Landing-Page.html) (email address *requested*, not required)
 * [Domain Driven Design Quickly](http://www.infoq.com/minibooks/domain-driven-design-quickly)
 * [DSL Engineering: Designing, Implementing and Using Domain-Specific Languages](http://dslbook.org) - Markus Voelter
-* [Exploring CQRS and Event Sourcing](https://msdn.microsoft.com/en-us/library/jj554200.aspx) - (EPUB, PDF)
+* [Exploring CQRS and Event Sourcing](https://docs.microsoft.com/en-us/previous-versions/msp-n-p/jj554200(v=pandp.10)) - Dominic Betts, Julián Domínguez, Grigori Melnik, Mani Subramanian, Fernando Simonazzi ([EPUB, PDF](http://www.microsoft.com/en-us/download/details.aspx?id=34774) - [code samples](http://go.microsoft.com/fwlink/p/?linkid=258571))
 * [Guide to the Software Engineering Body of Knowledge](https://www.computer.org/education/bodies-of-knowledge/software-engineering/v3) (email adddress *requested*)
 * [How to Design Programs](http://www.htdp.org)
 * [How to Write Unmaintainable Code](http://mindprod.com/jgloss/unmain.html)