No more bash

[OrioleNix]

I saw a snarky comment or some such that to actually be bash independent, we'd need to rewrite the code for identifying the local filesystem. They were right, and so I used an alternative method here, which to the end user works entirely the same. Technically its not function in sh, but none of our processes were functional in sh anyway.

[lambdcalculus]

That wasn't intended to be snarky, I apologize if it came off that way.

In my testing, this seems compatible with sh, so looks good to me. However, I believe the shebang should either be #!/usr/bin/env sh or #!/bin/sh. As it is, the script doesn't do anything if you directly run it from a bash/sh shell, only if you do something like sh INSTALL.sh.

[OrioleNix]

Done, never tested outside of using sh to runner the command, didn't think about it.

[lambdcalculus]

LGTM then! Thanks you for the improvement here.