matrix row.

Compiles again and works for the sequential case.

[[Imported from SVN: r3650]]

[[Imported from SVN: r3649]]

[[Imported from SVN: r3648]]

[[Imported from SVN: r3647]]

[[Imported from SVN: r3646]]

method insertLinearSegment() is now private, as it is not supposed to be used from the outside any more

[[Imported from SVN: r3645]]

[[Imported from SVN: r3644]]

[[Imported from SVN: r3643]]

[[Imported from SVN: r3642]]

Cannot anybody test this definitely on a machine that has no MPI. I
simulated it by setting HAVE_MPI to false.

[[Imported from SVN: r3641]]

[[Imported from SVN: r3640]]

[[Imported from SVN: r3639]]

... well now my lib builds again and the test works aswell

... hope that's all ...

[[Imported from SVN: r3638]]

[[Imported from SVN: r3637]]

[[Imported from SVN: r3636]]

[[Imported from SVN: r3635]]

[[Imported from SVN: r3634]]

This is needed as one wants to setup only those indices involved in
the  communication.

First step in making AMG work with those smaller index sets.

[[Imported from SVN: r3633]]

changed include

[[Imported from SVN: r3632]]

renamed file

[[Imported from SVN: r3631]]

P1FEFunction can be compiled without having MPI again.

[[Imported from SVN: r3630]]

[[Imported from SVN: r3629]]

[[Imported from SVN: r3628]]

[[Imported from SVN: r3627]]

signed/unsigned comparison

[[Imported from SVN: r3626]]

Testing still pending.

[[Imported from SVN: r3625]]

[[Imported from SVN: r3624]]

[[Imported from SVN: r3623]]

[[Imported from SVN: r3622]]

[[Imported from SVN: r3621]]

missing.

[[Imported from SVN: r3620]]

[[Imported from SVN: r3619]]

[[Imported from SVN: r3618]]

[[Imported from SVN: r3617]]

[[Imported from SVN: r3616]]

[[Imported from SVN: r3615]]

- provides sum/product/min/max for any value type with operator+, operator* and operator <
  in a generic way using MPI Operators ans MPI data types. Really nice :-)
- Default version provides dummy communication functions. Can be used to
  make sequential versions compile without MPI
- It would be possible to include also point to point communication to have
  a nice way to avoid including mpi.h everywhere.

[[Imported from SVN: r3614]]

[[Imported from SVN: r3613]]

[[Imported from SVN: r3612]]

[[Imported from SVN: r3611]]