#113 Event Driven Architecture

Adds various changes including :
- Fixes to Javadoc
- Test refactoring and improvements
- Refactored EventDispatcher to be immutable
- Removed DynamicRouter interface since it not needed
- Renamed Channel to a more appropriate name - Handler

event-driven-architecture/src/main/java/com/iluwatar/eda/event/UserCreatedEvent.java

@@ -3,7 +3,7 @@ package com.iluwatar.eda.event;
 import com.iluwatar.eda.model.User;
 
 /**
- * The {@link UserCreatedEvent} class should should be dispatched whenever a user has been created.
+ * The {@link UserCreatedEvent} should should be dispatched whenever a user has been created.
  * This class can be extended to contain details about the user has been created. In this example,
  * the entire {@link User} object is passed on as data with the event.
  */