Address post-merge comments on PR #71

[jo2y]

• Quote bash variable when possible.
• Fix an undefined $root_dir
• Remove a redundant rm and let the defined trap handler do it.
• echo -e is needed when trying to display escape codes.
• Remove incorrect {{foo}} double curly braces.

[jo2y]

@rogerhub Take a look please. I resisted the urge to change all of the $foo to ${foo} because I'm not sure if there is an official style. I stuck with the majority existing style.

[jdelfino]

Hi, is anyone still looking at this? The python .deploy commands are currently broken.