Refactoring
Improved tests
Added WorldClientTest, working on preventing memory leaks.
Added WorldClientUpdater test.
Cleaned up test output
Trying a design pattern for testing executable messages.
Added ExecutableActorVisibleMessageTest, made minor changes to other tests.
Added ExecutableForceStateMessageTest
Fixed(?) spurious weirdness with some tests, added ExecutableObjectInvisibleMessage test.
More test tweaking.  I might need a better way to stall method returns...
Added ExecutableStateChangeMessageTest
Added ExecutableObjectVisibleMessageTest
Added ExecutableWorldLogoutResponseTest
Added call to sendBlockingLogoutRequest