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The old code crashes when calling an MPI_Allreduce. The reason is that
part of the input array (t_tmp in this case) is not initialized.

* Removed redundant malloc, memset and memcpy
* Use pinned host memory
* Implemented blocking for GPU code path in step5
* Removed unused code

ELPA can now be linked against a 64bit integer version of MPI and
ScalaPack. This is an experimental feature

The following points are still to be done
- does not work with real QR-decomposition
- generalized routines return wrong results
- the C tests and the C Cannon algorithm implementation do not
  work (no 64bit header files for MPI *at least* with Intel MPI)

ELPA can now link agains a 64bit integer verion of BLAS/LAPACK.
Currently this only works if ELPA is compiled with MPI=OFF!

The 64bit support is not available in the legacy interface

so that it works if one of bandred / band_to_full steps are done on GPU
and the other one on CPU

elpa2_trans_ev_band_to_full_template

The blocking factor can be set now with the new interface
set method. The default is 3

Autotuning still has to be implemented.

This closses issue #44

The blocking factor can be set now with the new interface
set method. The default is 3

Autotuning still has to be implemented.

This closses issue #44

in elpa2_trans_ev_band_to_full_template

in elpa2_trans_ev_band_to_full_template

in elpa2_trans_ev_band_to_full_template

in elpa2_trans_ev_band_to_full_template

Anything if it makes Andreas happy :)

This is a bit cumbersome, as it involves yet another abstract
intermediate type, but necessary due to language limitations.

on misnky

added several larger tests in CI. Still missing for gfortran (no
gfortran+cuda tests at the moment, will be added)