Add Xer.Cqrs Library

Would like to share this CQRS library I am developing. :)

readme.md

@@ -194,6 +194,7 @@ The term was coined by Eric Evans in his book of the same title.
 - [Broadway](https://github.com/broadway/broadway) - Broadway is a (PHP) project providing infrastructure and testing helpers for creating CQRS and event sourced applications.
 - [shriek-fx](https://github.com/ElderJames/shriek-fx) - An simple,elegant and useful Domain-Driven Design and CQRS framework developed using .NET Core 2.0.
 - [Rails Event Store](https://railseventstore.org) - Rails Event Store (RES) is a library for publishing, consuming, storing and retrieving events. It's your best companion for going with an event-driven architecture for your Rails application.
+- [Xer.Cqrs](https://github.com/jeyjeyemem/Xer.Cqrs) - A simple library for creating applications based on the CQRS pattern with support for attribute routing and hosted handlers. Developed in C# targeting .NET Standard 1.0.
 
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