Merge pull request #126 from streeve/readme_features #453

Job	Run time
CUDA (Release, 3.7.02)	5m 30s
HIP (hipcc, Release, 3.7.02)	4m 11s
CI (ubuntu:latest, g++, SERIAL, Debug, 3.7.02, HDF5)	1m 40s
CI (ubuntu:latest, g++, SERIAL, Release, 3.7.02, HDF5)	2m 1s
CI (ubuntu:latest, g++, OPENMP, Debug, 3.7.02, HDF5)	1m 54s
CI (ubuntu:latest, g++, OPENMP, Release, 3.7.02, HDF5)	2m 13s
CI (ubuntu:latest, clang++, SERIAL, Debug, 3.7.02, HDF5)	1m 26s
CI (ubuntu:latest, clang++, SERIAL, Release, 3.7.02, HDF5)	1m 58s
CI (ubuntu:latest, clang++, OPENMP, Debug, 3.7.02, HDF5)	1m 35s
CI (ubuntu:latest, clang++, OPENMP, Release, 3.7.02, HDF5)	2m 5s
CI (ubuntu:latest, g++, SERIAL, Debug, 3.7.02, SILO)	1m 41s
CI (ubuntu:latest, g++, SERIAL, Debug, 3.7.02, NONE)	1m 40s
CI (ubuntu:latest, g++, SERIAL, Debug, 3.7.02, BOTH)	1m 39s
	29m 33s

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