NEW: sct_utils: added module "add_suffix"
NEW: sct_utils: added module "add_suffix"

Former-commit-id: 1c87e3b121f65cbf2570e2e7a8120afdefeaee02 [formerly c9ac9ee380a449259fb7492c8fe25905c301538d]
Former-commit-id: e0515d57228dcd8d4b8fe11d910669f65b5ac23b
Former-commit-id: e44ae3e22e06f4b09fd1435a80534d76adeeab4a
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox