install all headers

[[Imported from SVN: r875]]

istl/Makefile.am

@@ -6,7 +6,7 @@ SOURCES = allocator.hh basearray.hh bcrsmatrix.hh bvector.hh gsetc.hh io.hh istl
 	ilu.hh operators.hh preconditioners.hh solvers.hh indexset.hh communicator.hh remoteindices.hh mpitraits.hh \
 	interface.hh indicessyncer.hh matrixindexset.hh selection.hh plocalindex.hh localindex.hh scalarproducts.hh \
 	solvercategory.hh bdmatrix.hh matrixutils.hh schwarz.hh owneroverlapcopy.hh matrix.hh supermatrix.hh superlu.hh \
-	pardiso.hh
+	pardiso.hh overlappingschwarz.hh
 
 istldir = $(includedir)/dune/istl
 istl_HEADERS = $(SOURCES)