ENH: make the UseDirectionCosines option default to true



git-svn-id: https://svn.bigr.nl/elastix/trunkpublic@4457 4d348492-3962-11de-aa85-65a2020054a3
PERF: minor

Only copy the final transform parameters from the optimizer to the transform when needed.



git-svn-id: https://svn.bigr.nl/elastix/trunkpublic@4458 4d348492-3962-11de-aa85-65a2020054a3