Merge pull request wireapp#6 from mat1th/master

Add translations to the way's of contributions;

README.md

@@ -73,3 +73,8 @@ If you find a bug in how Wire apps work, please submit a ticket to [our support]
 
 If you wish to contribute source code to one of our repositories you have to sign our [Contributor Agreement](https://github.com/wireapp/wire/raw/master/assets/Wire%20Contributor%20Agreement.pdf) first.
 Please [download](https://github.com/wireapp/wire/raw/master/assets/Wire%20Contributor%20Agreement.pdf) the agreement, fill in all required information and send it to [email protected]. After that we will shortly be able to accept your Pull Requests on GitHub.
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+## Translate the app
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+You can help with the crowdsourced translations from Wire Apps on [Crowdin](https://crowdin.com/projects/wire).
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