Installation Fails on OS X

[chrissphinx]

This is due to the install command using -D -d instead of just -d. I don't think this change would affect the Linux install. The manpage from OS X:

-d    Create directories.  Missing parent directories are created as required.

The manpage from Linux:

-d    treat all arguments as directory names; create all components of the specified directories
-D    create all leading components of DEST except the last, then copy SOURCE to DEST