Feature regions #940

Job	Run time
CMake Serial Minimal Build on Linux	1m 8s
CMake build on MacOS	7m 1s
CMake Serial With Clawpack Build on Linux	9m 28s
CMake Serial With Clawpack and HDF Build on Linux	10m 38s
CMake Serial With GeoClaw Build on Linux	3m 58s
CMake Serial With CudaClaw (CUDA 10.1) Build on Linux	2m 21s
CMake Serial With CudaClaw (CUDA 11.3) Build on Linux	3m 19s
CMake MPI Minimal Build on Linux	2m 7s
CMake MPI With Clawpack Build on Linux	8m 34s
CMake MPI With Clawpack and HDF Build on Linux	9m 49s
CMake MPI With GeoClaw Build on Linux	3m 56s
CMake MPI With CudaClaw (CUDA 10.1) Build on Linux	2m 38s
CMake MPI With CudaClaw (CUDA 11.3) Build on Linux	3m 40s
CMake MPI With ThunderEgg Build on Linux	3m 47s
	1h 12m 24s

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