Ensure arguments passed are directories

[danthem]

Check if $1 and $2 are directories.

If $1 doesn't exist or is not a directory: Fail
If $2 doesn't exist: Ask if user wants script to create directory
If $2 exists but is a file: Fail

[danthem]

Recently had to use the script myself and came across this issue again. Will start working on an updated version of this script with better error detection and handling.