added CONTRIBUTING.md with CLA agreement to be shown in pull requests

gkovacs · gkovacs · commit 1c7b3d7ff752 · 2015-05-24T17:57:26.000-07:00
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
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+To get started, <a href="https://www.clahub.com/agreements/crowdresearch/crowdsource-platform">sign the Contributor License Agreement</a>.

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	`1`	`+To get started, <a href="https://www.clahub.com/agreements/crowdresearch/crowdsource-platform">sign the Contributor License Agreement</a>.`