Bug fix and manual update

Please note that the function cat_surf_render in the CAT12 toolbox could not proceed with the gifti files with cdata which is in file_array format properly. I have submitted this issue to Gaser.

A simple way to solve this problem is to insert one line between two lines in function cat_surf_render:

    M.cdata = [M.cdata;Mt.cdata]; % line 248
    M.cdata = double(M.cdata); % INSERT HERE!!!
    labelmapclim = [min(M.cdata),max(M.cdata)]; % line 249

In different versions of CAT12 these two lines have different positions. So please Ctrl/cmd + F to find these two lines and then insert the code.

Then it would work all well.