Added configuration setting for default batch size when fetching messages from queues and topics.
Merge pull request #37 from nhuhuynh/master

Added configuration setting for default batch size when fetching messages from queues and topics.
Merge branch 'master' of github.com:DamianMac/Nimbus into ConfigurationRefactor

Conflicts:
	src/Nimbus/Configuration/BusBuilder.cs
	src/Nimbus/Configuration/BusBuilderConfiguration.cs
	src/Nimbus/Infrastructure/Commands/CommandMessagePump.cs
	src/Nimbus/Infrastructure/Events/CompetingEventMessagePump.cs
	src/Nimbus/Infrastructure/Events/MulticastEventMessagePump.cs
	src/Nimbus/Infrastructure/MessagePump.cs
	src/Nimbus/Infrastructure/RequestResponse/MulticastRequestMessageDispatcher.cs
	src/Nimbus/Infrastructure/RequestResponse/RequestMessageDispatcher.cs
Added a refactoring note.
Reintroduced message batching now that we have the message receivers mostly refactored.
More refactoring towards encapsulation queue writer behaviour.