OPT: utils: created send_email
OPT: utils: created send_email

Former-commit-id: e77dce3eea85bdbc2e2824bc1462f77778b5c508
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox