This special remote type stores file contents in directory.

One use case for this would be if you have a removable drive that
you want to use it to sneakernet files between systems (possibly with
[[encrypted|encryption]] contents). Just set up both systems to use
the drive's mountpoint as a directory remote.

Setup example:

	# git annex initremote usbdrive type=directory directory=/media/usbdrive/ encryption=none