Feature restart #873

Job	Run time
CMake build on MacOS	7m 0s
CMake Serial Minimal Build on Linux	53s
CMake Serial With Clawpack Build on Linux	6m 50s
CMake Serial With Clawpack and HDF Build on Linux	8m 6s
CMake Serial With GeoClaw Build on Linux	1m 16s
CMake Serial With CudaClaw (CUDA 10.1) Build on Linux	2m 44s
CMake Serial With CudaClaw (CUDA 11.3) Build on Linux	3m 58s
CMake MPI Minimal Build on Linux	1m 14s
CMake MPI With Clawpack Build on Linux	7m 34s
CMake MPI With Clawpack and HDF Build on Linux	8m 29s
CMake MPI With GeoClaw Build on Linux	1m 52s
CMake MPI With CudaClaw (CUDA 10.1) Build on Linux	3m 55s
CMake MPI With CudaClaw (CUDA 11.3) Build on Linux	4m 49s
CMake MPI With ThunderEgg Build on Linux	3m 37s
	1h 2m 17s

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