Node transform space refactoring. Translate(), Rotate() and LookAt() functions take a transform space (local, parent or world). Translate() has a behavior change: default space is local, as that is most often used in eg. camera movement, and is consistent with the default for rotations (the earlier fixedAxis = false was same as local space). The redundant TranslateRelative() function is removed. Add RotateAround() function, which allows rotating around a pivot in either local, parent or world space. Closes #295.
Added note that Node::Translate() in local mode disregards scale to keep movement speed independent. Removed test variable from 04_StaticScene.as.
Merge remote-tracking branch 'remotes/origin/transformspace'