Mainly small install script improvements - Consistent usage of `$LUANHOME`, removed reliance on current directory. - Made Luan build and install fine (on Linux) without requiring launching it via sudo. Only asks to elevate privileges if installation failed. - Minor spelling mistake fix.

#!/bin/bash

set -eu

cd "$1";

#can't determine if network is available at startup
sleep 60;

./start.sh "launchd";