Merge pull request #264 from eschnett/eschnett/doc-email #1024

Job	Run time
download-build-test (cpu, real32, debug)	8m 39s
download-build-test (cpu, real64, debug)	8m 23s
download-build-test (cpu, real64, optimize)	12m 24s
download-build-test (cuda, real32, debug)	18m 41s
download-build-test (cuda, real64, debug)	19m 37s
download-build-test (cuda, real64, optimize)	18m 33s
download-build-test (rocm, real64, debug)	14m 34s
download-build-test (rocm, real64, optimize)	15m 49s
	1h 56m 40s

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