INST: added pandas as requirement
INST: added pandas as requirement

Former-commit-id: 3b4f6d9bec24bbc53bb06844055a8a93317a1002
Former-commit-id: 5e69da90c801fcff6274a42d7ae63c6617f657cd
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox