Default to a login shell with ssh; remove the '--login' option.

Closes #303.
Bug fix, closes #301: reset task proc flag.
Merge pull request #307 from hjoliver/301-timeout-reset

Bug fix, closes #301: reset task proc flag.
Merge pull request #306 from hjoliver/303-login-shell-default

Default to a login shell with ssh; remove the '--login' option.