Moved get_list_of_devices to LIB file

Since my get_list_of_devices function was needed for both install.sh
and the fdisk wrapper script, and they were both the same, keeping
both synced was starting to be a pain.

Now:
	install.sh sources the LIB file to use internally
	install.sh copies the LIB file directly into /usr/local/bin/fdisk
		This is because I didn't want a separate lib file when
		the wrapper script was installed
Removed some commented out lines
Fixed a small bug