Standardize bash options

[asymmetric]

Some scripts use set -e, some don't.

Unless there's a good reason for this, we should standardize on one - most likely set -e.

[dbrock]

I tend to leave out set -e when it doesn't do anything, most obviously when the program is a oneliner that starts with exec or echo or something else that can't fail. I guess I like doing this because it sort of reminds me to think about exactly what I'm doing, and whether the program can actually fail. Another example can be when you explicitly handle errors:

#!/bin/sh
dangerous || safe