DOC: updated version to 1.1-beta
DOC: updated version to 1.1-beta

Former-commit-id: 5d38c7dc4ee4ff97970c023bed44b0ab49642f1a [formerly 71600a1e26fcf7b459cfa88adfc4d20dbd556f19]
Former-commit-id: d8d97c073932afcbda4f2415788fe12d80b1eac2
Former-commit-id: b5e8bb4f0d5fd46fe1e52587530d3e9cbbcee46e
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox