Add how-to-use instructions in README

5 jobs for 0.0.1 in 14 seconds (queued for 1 second)
latest
Status Name Job ID Coverage
  Test
passed pouet-it #281525

00:00:14

failed pouet-it #281514

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failed pouet-it #281511

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failed pouet-it #281512

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failed pouet-it #281513

00:00:12