Max. wood from natural areas harvested at replacement rate.
Effect of previous land cover on wood yield only lasts for one timestep.
No wood harvest from agricultural expansion.
Added variable tree logging cost (fixes oscillating export issue).
Timber and carbon production now serialized during calibration.

Changed commodity type kcal per t value. Updated files with removal of fish from monogastrics and slight tidy up of oilcrops re palm kernels