A new install script to install from the intermediate 'install' subdir.
Also now a bit more careful in use of 'cp -a'. When installing to
system-wide directories we probably do not want to preserve ownership
of the random unprivileged user that originally built the binaries.
The user who does the install (probably root) is the correct person
to own the target files.
iap10@freefall.cl.cam.ac.uk