Start mri_tank_surface algorithm with a clone of ct_tank algorithm.
update root gitignore
MRI tank left right boundary detection works for exterior tank inside surface
left right boundary detection now works better on inferior outside surface.
mri_tank writing progression
add old images that belongs to ct_tank to ct_tank (might be removed later)
update .gitignore
Merge branch 'ct_tank'

merging ct_tank to master
Merge branch 'mri_tank'

merging mri_tank to master
Merge branch 'phantom_design'

merge phantom_design into master