ISTL documentation appeared under common because fmatrix was moved to

there.

Fixed it by creating a new doxygen module "Dense Matrix and Vector
Template Library" under Common for fmatrix.hh and fvector.hh

ISTL doxygen module is now defined in istl/istl.hh

[[Imported from SVN: r160]]

istl/istl.hh

 // -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 // vi: set et ts=4 sw=2 sts=2:
-#ifndef __DUNE_ISTL_HH__
-#define __DUNE_ISTL_HH__
+// $ Id: $
+#ifndef DUNE_ISTL_HH
+#define DUNE_ISTL_HH
 
-/** @defgroup ISTL Dune Sparse Matrix Vector Templates
+/** @defgroup ISTL Iterative Solvers Template Library
 
     The SPMV module defines a set of classes for sparse
     matrices and vectors with the following features: