Check if zsh is installed and add configuration.
Check if zsh is installed and add configuration.


Former-commit-id: 6449c6fa53c563a31b350b0d597f5785954a5a0e
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox