[[Imported from SVN: r1056]]

calculate max distance correctly. 
neigbours method no visits the neighbour and counts them instead of
just returning (0,0). (Fixes the rounding step for the aggregates.)

[[Imported from SVN: r1055]]

- Compiles with g++-4,4 now. Error was error: declaration of
  ‘Dune::SuperLUMatrix<Dune::BCRSMatrix<Dune::FieldMatrix<K, n, p>,
  TA> >& m’shadows template parm ‘int m’ 
  Fixes flyspray #581

- Removed wrong assertion. One should not check whether the whole
  matrix is copied if one just copies a part of it. (Blame copy & paste)

[[Imported from SVN: r1053]]

[[Imported from SVN: r1052]]

[[Imported from SVN: r1049]]

[[Imported from SVN: r1047]]

[[Imported from SVN: r1046]]

The matrix type is also used for the ILU member variable, which is
initialised with a copy of the matrix and then inclompletely LU
decomposed.  This member variable must not be const.

[[Imported from SVN: r1045]]

When initializing coarse aggregate number for visualization make sure that each number is used only once and number are consecutive from 0 but still randomly distributed.

[[Imported from SVN: r1044]]

Randomize coarsest aggregate numbers to get better contrast between
aggregates.

[[Imported from SVN: r1043]]

[[Imported from SVN: r1042]]

[[Imported from SVN: r1041]]

[[Imported from SVN: r1040]]

[[Imported from SVN: r1039]]

local problem on the fly at each step.

ATTENTION: Semantics changed. The default is now the on the fly
computation (which saves quite some memory).

[[Imported from SVN: r1038]]

[[Imported from SVN: r1037]]

Project coarsest aggregates to finest level for visualization.

[[Imported from SVN: r1035]]

        MINRES was added)

[[Imported from SVN: r1034]]

as expected!

[[Imported from SVN: r1033]]

[[Imported from SVN: r1032]]

[[Imported from SVN: r1031]]

[[Imported from SVN: r1030]]

[[Imported from SVN: r1029]]

patch by Andreas Lauser

[[Imported from SVN: r1028]]

We need to set the overlap to zero on the coarse levels to avoid
degradation of convergence for coarse levels.

[[Imported from SVN: r1026]]

[[Imported from SVN: r1025]]

[[Imported from SVN: r1024]]

[[Imported from SVN: r1023]]

[[Imported from SVN: r1020]]

better results for Arnes problems.

[[Imported from SVN: r1019]]

flag set, but not both.

Corrected Unsymmetric Criterion to only set the depends flag on the
current edge and the influence on the transposed one.

[[Imported from SVN: r1018]]

the tests.

[[Imported from SVN: r1017]]

[[Imported from SVN: r1016]]

(Using the static streams of DUNE is just a pain as we need to
recompile to activate debugging.

[[Imported from SVN: r1015]]

(Using the static streams of DUNE is just a pain as we need to
recompile to activate debugging.

[[Imported from SVN: r1014]]

[[Imported from SVN: r1013]]

isotropic and anisotropic case.

[[Imported from SVN: r1012]]

Remove old expression templates code.  Christian and I decided that we do not intend to implement expression templates in dune-istl anymore.

[[Imported from SVN: r1011]]

[[Imported from SVN: r1010]]

Added notion of OpenMPI bug to README as ISTL will not work with it. As this is crucial I would really appreciate this patch being merged to the release. It will save me of giving a lot of support

[[Imported from SVN: r1008]]