[[Imported from SVN: r1552]]

Unfortunately DUNE_DEPRECATED does not work before definitions of
template member functions inside the class.

[[Imported from SVN: r1551]]

[[Imported from SVN: r1550]]

[[Imported from SVN: r1549]]

wrapper of SuperLU solver.

[[Imported from SVN: r1548]]

direct solver.
Added a method to AMG to check whether it uses a direct solver on the
coarse level.

[[Imported from SVN: r1547]]

communicate result of coarse solver to other processes, otherwise catching the exception leads to a deadlock

[[Imported from SVN: r1546]]

[[Imported from SVN: r1545]]

Thanks to Uli Sack for the Patch.

[[Imported from SVN: r1544]]

[[Imported from SVN: r1542]]

* use std::abs and std::sqrt instead of fabs and sqrt
* use real_type instead of double to (hopefully) fix probelms with std::complex

[[Imported from SVN: r1540]]

remove tabs from solvers.hh and fix indentation

[[Imported from SVN: r1539]]

[[Imported from SVN: r1538]]

[[Imported from SVN: r1537]]

credits go to Ansgar Burchardt

[[Imported from SVN: r1536]]

[[Imported from SVN: r1535]]

[[Imported from SVN: r1534]]

[[Imported from SVN: r1533]]

* allow extending the dependency operators via inheritance

[[Imported from SVN: r1532]]

[[Imported from SVN: r1531]]

* fix typo in comment

[[Imported from SVN: r1530]]

[[Imported from SVN: r1529]]

[[Imported from SVN: r1528]]

"DOUBLE"
to "SLU_DOUBLE".
Deprecated pre-2005 support of SuperLU.

[[Imported from SVN: r1527]]

[[Imported from SVN: r1526]]

[[Imported from SVN: r1525]]

to dune-istl.

[[Imported from SVN: r1524]]

[[Imported from SVN: r1523]]

[[Imported from SVN: r1522]]

[[Imported from SVN: r1520]]

Fixes flyspray 1014.

[[Imported from SVN: r1519]]

[[Imported from SVN: r1509]]

(Aplied patch of Matthias Wohlmut with a small modification that
resets the precision to the old value).
Thanks go to Matthias.

[[Imported from SVN: r1508]]

The variable is mentioned in some commented-out code later, so comment it out
as well instead of removing it entirely.

[[Imported from SVN: r1506]]

Free MPI communicators resulting from the AMG accumulation process when they are not needed anymore.

[[Imported from SVN: r1504]]

[[Imported from SVN: r1503]]

defect of the already preconditioned rhs).

[[Imported from SVN: r1502]]

[[Imported from SVN: r1500]]

[[Imported from SVN: r1499]]

remeber default reduction when apply is called with an explicit reduction

[[Imported from SVN: r1498]]