gperf: new prerequisite

[Ben Pfaff]

The newest Gnulib requires gperf, so I installed this.  I decided
to also make it clear that gnulib at the same level as PSPP is
recommended.  OK?

--- README.CVS.~1.11.~  2007-03-31 10:25:25.000000000 -0700
+++ README.CVS  2007-04-03 17:05:04.000000000 -0700
@@ -12,9 +12,13 @@ following:
 
        * pkg-config 0.21 (or later).
 
+        * gperf 3.0.1 (or later).
+
        * Gnulib, from CVS (see http://savannah.gnu.org/cvs/?group=gnulib).
          Note that Gnulib does not require any form of installation:
-         simply checking it out into a directory is sufficient.
+         simply checking it out into a directory is sufficient.  We
+         recommend checking out gnulib into a directory named `gnulib'
+          at the same level as PSPP.
 
        * libtool 1.5.22 (or later).
 


-- 
"doe not call up Any that you can not put downe."
--H. P. Lovecraft