Improve Elixir/Mix/Hex.pm compatibility#3

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aesedepece wants to merge 3 commits intob:masterfrom

Commits on May 15, 2016

Improve Elixir/Mix/Hex.pm compatibility
Adán Sánchez de Pedro Crespo
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Commits on Oct 15, 2016

Use rebar3
aesedepece
committed

Commits on Oct 20, 2016

Rename module sha3 → keccak
aesedepece
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