NEW: script to concatenate bvecs in time
NEW: script to concatenate bvecs in time

Former-commit-id: 46f50ca652108a7774f5c4f5a0e7fd79b280eb3b [formerly 2c8a1756daceaa7902f837c02058af076ec54950]
Former-commit-id: 0d20c9ae651a5b6d4b9faf2d667abe9107f05ce3
Former-commit-id: f6a068e8734eb72a1336127588f3e23c6fbbe544
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox