Handle escaping/eval in a different way.

Uses the standard shell script template, Bash safety options, &c.
Handle escaping/eval in a different way.

Uses the standard shell script template, Bash safety options, &c.
Reintroduced call to  to allow time for application changes to be reflected in mesos.
Merge pull request #125 from mesosphere/wip-shell-escaping

:+1: LGTM, thanks Jason