Created publisher class which sends a string message to a list of subscribers.
Created an interface for the subscribers.
Created a console subscriber who takes messages and prints them to the console with its name.
Created a simple use case for the Publisher and Subscriber model.
Created a PublisherTest class
Added JMock as a depedency for integration testing
Added a rule for JUnit and JMock mocking
Wrote single subscriber test #4
Wrote multiple subscriber test #4
Wrote sinle subscriber multiple messages test
Wrote a test for multiple subscribers recieving multiple messages. Closes #4