Merge pull request #335 from hannesbrandt/feature-partition #874

Job	Run time
CMake Serial Minimal Build on Linux	54s
CMake Serial With Clawpack Build on Linux	7m 17s
CMake build on MacOS	7m 11s
CMake Serial With Clawpack and HDF Build on Linux	7m 51s
CMake Serial With GeoClaw Build on Linux	1m 10s
CMake Serial With CudaClaw (CUDA 10.1) Build on Linux	2m 47s
CMake Serial With CudaClaw (CUDA 11.3) Build on Linux	3m 55s
CMake MPI Minimal Build on Linux	1m 18s
CMake MPI With Clawpack Build on Linux	7m 18s
CMake MPI With Clawpack and HDF Build on Linux	8m 25s
CMake MPI With GeoClaw Build on Linux	2m 4s
CMake MPI With CudaClaw (CUDA 10.1) Build on Linux	3m 49s
CMake MPI With CudaClaw (CUDA 11.3) Build on Linux	5m 20s
CMake MPI With ThunderEgg Build on Linux	3m 43s
	1h 3m 2s

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