Add documentation for Accelerators and update examples to reproduce journal submission #2082

Job	Run time
Julia 1.6 - ubuntu-latest - x64 - pull_request	7m 42s
Julia 1.6 - windows-latest - x64 - pull_request	20m 37s
Julia 1.6 - macOS-latest - x64 - pull_request	8m 5s
Julia 1 - ubuntu-latest - x64 - pull_request	9m 31s
Julia 1 - windows-latest - x64 - pull_request	12m 17s
Julia 1 - macOS-latest - x64 - pull_request	12m 20s
test_success	1s
	1h 10m 33s

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