Simplify saving ROI as .nii in createRoi

[JeanneCaronGuyon]

Is there an existing issue for this?

• I have searched the existing issues

New feature

createROI : From line 301, to save ROI
use the more simple function "save_as_image" from mars bar

saveroi(roiObject, ...
          fullfile(outputDir,  [roiName '.mat'])); % in .mat format
save_as_image(roiObject, ...
          fullfile(outputDir, [roiName '.nii'])); % in .nii format

Unclear documentation

No response

[Remi-Gau]

Suggestion added in #44

Thanks @JeanneCaronGuyon