NEW: added new functions for registration of images
NEW: added new functions for registration of images

Former-commit-id: 1dc5a6dd23c54fa98c6f410c2fb234ed8909fc7e [formerly 8ebe5b1b655ed56196fbe2640aa3eb439b1a0fa2]
Former-commit-id: d8adf8b331bf7d2c9d294976d4d30949ab5bf750
Former-commit-id: d01ce5abee62f920d214d3744339e0c94aab34a7
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox