enhancement and bugfix - updated the leadfield_interpolate code and test script, see http://bugzilla.fcdonders.nl/show_bug.cgi?id=1317


git-svn-id: svn+ssh://svn.fcdonders.nl/home/svnroot/fieldtrip/trunk@8997 0cf7c7f0-3615-4144-b4e6-68da3bce3cd0
automatically synchronized identical files to revision 8997

git-svn-id: svn+ssh://svn.fcdonders.nl/home/svnroot/fieldtrip/trunk@8998 0cf7c7f0-3615-4144-b4e6-68da3bce3cd0