Start + Stop Script Using Wrong Shebang

[DiCanio]

The script files start-develop.sh and stop-develop.sh are using the following shebang: #!/bin/sh.
However, the scripts itself are not shell independent. This is because bash-specific substitutions are used.

Thus, we should explicitly state within the shebang that these scripts have to be ran with a bash (#!/usr/bin/env bash). Otherwise this will lead to problems down the line.