DOC: updated the manual a bit 

according to a comment of Ronald van 't Klooster

git-svn-id: https://svn.bigr.nl/elastix/trunkpublic@4191 4d348492-3962-11de-aa85-65a2020054a3
git-svn-id: https://svn.bigr.nl/elastix/trunkpublic@4196 4d348492-3962-11de-aa85-65a2020054a3
git-svn-id: https://svn.bigr.nl/elastix/trunkpublic@4197 4d348492-3962-11de-aa85-65a2020054a3
STYLE: many



git-svn-id: https://svn.bigr.nl/elastix/trunkpublic@4198 4d348492-3962-11de-aa85-65a2020054a3
Made MEVIS tiff conditional
made MEVISDICOMTIFF conditional
Merge remote-tracking branch 'origin/master'