enhancement - enable correct reading of freesurfer-based parcellation in caret's gii format

git-svn-id: svn+ssh://svn.fcdonders.nl/home/svnroot/fieldtrip/trunk@8342 0cf7c7f0-3615-4144-b4e6-68da3bce3cd0
bugfix - updated handling of caret's gii format, which did not work robustly on all types of parcellations upon previous commit

git-svn-id: svn+ssh://svn.fcdonders.nl/home/svnroot/fieldtrip/trunk@8343 0cf7c7f0-3615-4144-b4e6-68da3bce3cd0
bugfix - added missing files for Arjen's work on bug 1792


git-svn-id: svn+ssh://svn.fcdonders.nl/home/svnroot/fieldtrip/trunk@8344 0cf7c7f0-3615-4144-b4e6-68da3bce3cd0