BUG: check if data, seg, and landmarks are in the same space, if not, print error message and stop the script
BUG: check if data, seg, and landmarks are in the same space, if not, print error message and stop the script

Former-commit-id: ddae3532164e646270bb7b059e8f416564032033 [formerly a83574c34af26b7569ee5c5db2209ae1a973cb88]
Former-commit-id: 9ea8411cf07df28394501d1f9e0ea859f51bdac7
Former-commit-id: 5fff21dd0eb5ce6716dad8a79986533a0d095dfe
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox