REF: now check if minctools are correctly installed
REF: now check if minctools are correctly installed

Former-commit-id: b23761c56964c28730bd3e7e20c9ca0a86f3dfb1
Former-commit-id: 999b2a36c57d480458dcc97b6e40fe8494799eb5
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox