(concord-turtle-insert-object): New function.

(concord-turtle-insert-object): New function.
(concord-turtle-insert-decomposition): New function.
(concord-turtle-insert-relations): Use `concord-turtle-insert-object'.
(concord-turtle-insert-target-value): Use
`concord-turtle-insert-decomposition' for `=decomposition' instead of
`concord-turtle-insert-relations'.