minor fixes
fixed unsanitize fwhm bug
 1. BUGFIX: centralized 0 in colorbar --- reporting/glm_reporter.py
 2. Multi-session support in  MRIMotionCorrection --- algorithms/registration/spm_realign.py
Merge pull request #19 from dohmatob/motion-correction

Motion correction
fixed merge conflicts
fixed hard-coded nifti path
fixed broken script