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This patch adds Python bindings to SENSEI.

* Flatten nested namespaces to only 1 level deep
* Update to ADIOS 1.11
* SWIG Python bindings and CMake driver code
* Use interface libraries for dependencies
* export targets and generate a working SENSEIConfig.cmake
* CMake find modules for Libsim, NumPy, and mpi4py
* Newton Python miniapp demonstrating use of SENSEI from Python
* Warning cleanup
* VTKPosthocIO analysis adaptor, writes any VTK dataset to either ".pvd"
  or ".visit" format. Can be used to generate representative data for
  configuring Catalyst and Libsim configs.
* Add a method to the Catalyst adaptor to configure a pipeline from
  Catalyst Python script. Before this was in ConfigurableAnalysis.
* Enable point meshes in the Libsim adaptor
* Update the read me

Catalyst python pipeline adaptor

See merge request !37

Fixes to build with VTK 7.1



See merge request !35

Temporarily avoid using XMLPWriter.

Instead we explicitly write the metafile ourselves.

See merge request !30

Timer improvement

I thought about doing this with a MPI subcommunicator but then it would give the wrong process ranks in the output.

See merge request !32

Instead we explicitly write the metafile ourselves.

Add -o option to oscillator to save each step directly using MPI-IO

I've added an option to miniapps/oscillators/oscillator.cpp to save each time step directly, using MPI-IO. I haven't really tested it (other than making sure that it compiles). It does work outside of Sensei (in oscillator's original codebase). In any case, I leave it up to others to decide whether to merge it in.

@utkarsh.ayachit

See merge request !29

Adding an endpoint for posthoc io.

This currently only supports VTK-XML files.

See merge request !28

This currently only supports VTK-XML files.

Now one can specify slice normal, origin and color range in XML config
for catalyst slice.

Improving SENSEIConfig.cmake.in



See merge request !27