Add `shuffle_axis_inplace` and `shuffle_axis_inplace_using`#742

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LukeMathWalker wants to merge 2 commits intorust-ndarray:masterfrom LukeMathWalker:sampling

+134-4

Commits on Oct 9, 2019

[ndarray-rand] Add sampling_axis_inplace and sampling_axis_inplace_using to
LukeMathWalker
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Commits on Oct 28, 2019

Merge branch 'master' into sampling
LukeMathWalker
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