Merge pull request #116 from streeve/custom_lps_particles #393

Job	Run time
CUDA (Release, 3.7.02)	5m 36s
HIP (hipcc, Release, 3.7.02)	3m 51s
CI (ubuntu:latest, g++, SERIAL, Debug, 3.7.02, HDF5)	1m 42s
CI (ubuntu:latest, g++, SERIAL, Release, 3.7.02, HDF5)	2m 9s
CI (ubuntu:latest, g++, OPENMP, Debug, 3.7.02, HDF5)	1m 51s
CI (ubuntu:latest, g++, OPENMP, Release, 3.7.02, HDF5)	2m 9s
CI (ubuntu:latest, clang++, SERIAL, Debug, 3.7.02, HDF5)	1m 42s
CI (ubuntu:latest, clang++, SERIAL, Release, 3.7.02, HDF5)	1m 47s
CI (ubuntu:latest, clang++, OPENMP, Debug, 3.7.02, HDF5)	1m 36s
CI (ubuntu:latest, clang++, OPENMP, Release, 3.7.02, HDF5)	1m 55s
CI (ubuntu:latest, g++, SERIAL, Debug, 3.7.02, SILO)	1m 53s
CI (ubuntu:latest, g++, SERIAL, Debug, 3.7.02, NONE)	1m 39s
CI (ubuntu:latest, g++, SERIAL, Debug, 3.7.02, BOTH)	1m 43s
	29m 33s

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