A few fixes#15

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Code0x58 wants to merge 7 commits intoMagicStack:masterfrom

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Commits on Oct 14, 2017

Commits on Oct 15, 2017

Commits on Oct 16, 2017

update and elaborate in README.rst
Code0x58
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Commits on Oct 21, 2017

move from using --benchmarks to positional args to filter benchmarks
Code0x58
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