Upgrade to NSB 3.3.5
Changed exercise 3 to use message conventions instead of deriving from IMessage
Merge branch 'ex3' into ex4

Conflicts:
	HelloWorld/HelloWorld/EndpointConfig.cs
	HelloWorld/Messages/Messages.csproj
Removed redundant NServiceBus namespace declaration
Merge branch 'ex4' into ex4_4

Conflicts:
	HelloWorld/Messages/Messages.csproj