Minor bug fixes

Minor bug fixes, more informative error messages
Removed reference to old atlas files

Version 3.6

Altas integration now from cerebellar_altas repository
Made all img/hdr to nii
Removed dead reference to removed atlases

Version 3.5

• Small fixes to the overall toolbox
• csf image not removed during isolation
• updates to documentation
• Atlas collection now removed from toolbox, it is independently maintained and distributed at https://github.com/DiedrichsenLab/cerebellar_atlases

version 3.4

• Surface files updates to work with Connectome Workbench
• Inclusion of new connectivity atlases
• Inclusion of MDTB functional atlas