Added link to HTML version of the NumPy documentation.

This closes bug #124943.

Doc/lib/libarray.tex

@@ -189,9 +189,11 @@ array('d', [1.0, 2.0, 3.14])
   \seemodule{xdrlib}{Packing and unpacking of External Data
                      Representation (XDR) data as used in some remote
                      procedure call systems.}
-  \seetitle[http://numpy.sourceforge.net/numdoc/numdoc.pdf]{The
+  \seetitle[http://numpy.sourceforge.net/numdoc/HTML/numdoc.html]{The
            Numerical Python Manual}{The Numeric Python extension
            (NumPy) defines another array type; see
            \url{http://numpy.sourceforge.net/} for further information
-           about Numerical Python.}
+           about Numerical Python.  (A PDF version of the NumPy manual
+           is available at
+           \url{http://numpy.sourceforge.net/numdoc/numdoc.pdf}.}
 \end{seealso}