correcting configure error message

libblas and liblapack are necessary for all algorithms, because hey
are used in the diagonalization routines.

configure

@@ -1633,10 +1633,8 @@ check_blas_libs_using_options() {
     check_library "libblas" "$blas_lib_dir" \
 	"$default_lib_paths"
     if test "x$found_lib" = "x" ; then
-        message "Error: libblas must be installed"
-        message "  to run the lattice algorithm, see http://www.netlib.org/blas"
-        message "  You can disable the lattice algorithm with the"
-        message "  --with-algorithms= flag"
+        message "Error: libblas must be installed!"
+        message "  It can be downloaded from http://www.netlib.org/blas"
         exit 1
     else
         local BLASLIBS_=-lblas
@@ -1655,10 +1653,8 @@ check_lapack_libs_using_options() {
     check_library "liblapack" "$lapack_lib_dir" \
 	"$default_lib_paths"
     if test "x$found_lib" = "x" ; then
-        message "Error: liblapack must be installed"
-        message "  to run the lattice algorithm, see http://www.netlib.org/lapack"
-        message "  You can disable the lattice algorithm with the"
-        message "  --with-algorithms= flag"
+        message "Error: liblapack must be installed!"
+        message "  It can be downloaded from http://www.netlib.org/lapack"
         exit 1
     else
         local LAPACKLIBS_=-llapack