Refactoring.
Minor cleanup of scenelib.h.
Move Transformable class into separate header.
Some refactoring, replace walkers with lambdas.
Compilation fix.
Rename abstract TransformNode to ITransformNode
Get rid of a small walker.
Another small walker converted.
Minor namespace-related stuff.
More scenelib.h cleanup.
Minor stuff.
VS2010 build fixes, needs explicit lambda return types .