delin and affine jacobians are incorrectly computed

[gdevenyi]

I managed to get the direction of estimation of the delin and affine jacobians wrong. This means that

• the relative jacobians actually had more residual affine effect added
• the absolute jacobians actually had the inverse affine effect added to them

These are likely to cause

• the relative jacobian to have a residual brain-size effect
• the absolute jacobian will have unknown effect due to complex interaction of affine/nlin

[gdevenyi]

Fixed by f91a45e957d8b6aacdbc212f4f71edb273ba25ab