NEW: -added alto slicered2d_syn and slicereg2d_bsplinesyn -added detection and deletion of outliner for regularization along z
NEW:
-added alto slicered2d_syn and slicereg2d_bsplinesyn
-added detection and deletion of outliner for regularization along z

Former-commit-id: a0e54382cfe1652936e4fd7b36c3962bbdacda1d [formerly f5a053aa6f9b655abc9d5bb263cb424705fcfa43]
Former-commit-id: 7fff41b721e2a16c030b919e8936987f06c7dec6
Former-commit-id: c9212c28e7d6a3f9f9293de7ebe9679656852f0f
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox