Merge pull request #340 from scottaiton/fix_varpoisson #137

Job	Run time
CMake build on MacOS	5m 44s
CMake Serial Minimal Build on Linux	1m 6s
CMake Serial With Clawpack Build on Linux	7m 6s
CMake Serial With Clawpack and HDF Build on Linux	7m 51s
CMake Serial With GeoClaw Build on Linux	1m 19s
CMake Serial With CudaClaw (CUDA 10.1) Build on Linux	2m 46s
CMake Serial With CudaClaw (CUDA 11.3) Build on Linux	3m 29s
CMake MPI Minimal Build on Linux	2m 11s
CMake MPI With Clawpack Build on Linux	7m 4s
CMake MPI With Clawpack and HDF Build on Linux	8m 25s
CMake MPI With GeoClaw Build on Linux	1m 56s
CMake MPI With CudaClaw (CUDA 10.1) Build on Linux	2m 45s
CMake MPI With CudaClaw (CUDA 11.3) Build on Linux	3m 54s
CMake MPI With ThunderEgg Build on Linux	3m 28s
	59m 4s

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