base. Log exception type info when logging errors.
ludus. Fix an issue in reading render passes in load tree.

Fix the render pass token constant to match the game tree script.
ludus. Add reading object to load tree.

This change does not create the object, only reads object data form the game tree.
ludus. Change to load tree token reading.

For 2 character tokens use resource stream read two char, instead of using read string constant.
ludus. Unite read object and read object content in load tree.

Object start token is read as part read object children.
Object content (including end token) is read in read object.
Root object start token is read in read root.