Add documentation for Accelerators and update examples to reproduce journal submission #2079

Job	Run time
Julia 1.6 - ubuntu-latest - x64 - pull_request	7m 52s
Julia 1.6 - windows-latest - x64 - pull_request	23m 11s
Julia 1.6 - macOS-latest - x64 - pull_request	7m 39s
Julia 1 - ubuntu-latest - x64 - pull_request	9m 27s
Julia 1 - windows-latest - x64 - pull_request	11m 52s
Julia 1 - macOS-latest - x64 - pull_request	11m 7s
test_success	1s
	1h 11m 9s

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