enhancement - improved spm-based and headshape-based coregistration, added functionality for capturing an image when selecting landmarks/fiducials in order to facilitate post-hoc qualitycontrol

git-svn-id: svn+ssh://svn.fcdonders.nl/home/svnroot/fieldtrip/trunk@8338 0cf7c7f0-3615-4144-b4e6-68da3bce3cd0