Merge pull request #358 from scottaiton/update_p4est #145

Job	Run time
CMake build on MacOS	5m 9s
CMake Serial Minimal Build on Linux	1m 9s
CMake Serial With Clawpack Build on Linux	9m 40s
CMake Serial With Clawpack and HDF Build on Linux	10m 45s
CMake Serial With GeoClaw Build on Linux	1m 9s
CMake Serial With CudaClaw (CUDA 10.1) Build on Linux	2m 20s
CMake Serial With CudaClaw (CUDA 11.3) Build on Linux	3m 18s
CMake MPI Minimal Build on Linux	2m 14s
CMake MPI With Clawpack Build on Linux	8m 32s
CMake MPI With Clawpack and HDF Build on Linux	9m 59s
CMake MPI With GeoClaw Build on Linux	2m 25s
CMake MPI With CudaClaw (CUDA 10.1) Build on Linux	2m 59s
CMake MPI With CudaClaw (CUDA 11.3) Build on Linux	4m 1s
CMake MPI With ThunderEgg Build on Linux	4m 18s
	1h 7m 58s

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