Don't be a login shell; Don't want to pull in profile over top of what user may have.
dunit version is not 1.2.1.
composer install doesn't need to produce a defaults file, so don't add the unnessary side-effect.
Refactoring the shell script, added comments to the config.dist file.
Improvements to the documentation.
Clarify the -c flag option in help.
Improved README.