REF: resample: removed FSL dependency
REF: resample: removed FSL dependency

Former-commit-id: c31bb536ea19a0fda2541a138724cbdf0b1281b8 [formerly fd8059e86a012f89be84f11f62667a7ed43662f2]
Former-commit-id: 6e891bc10cc311ce4d82f07982416729099a3683
Former-commit-id: 50ef767df2d8424f40467205fcc8556acd606dca
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox