Thank you for contributing code to the Unchained project! Like many open source projects, we need a contributor license agreement from you before we can merge in your changes. You only need to fill out this agreement once.
In brief, by submitting your code to the Unchained project, you are granting us a right to use that code under the terms of this Agreement, including providing it to others. You are also certifying that you wrote it, and that you are allowed to license it to us. You are not giving up your copyright in your work.
Contributor License Agreements are important because they define the chain of ownership of a piece of software. Some companies won't allow the use of free software without clear agreements around code ownership. That's why many open source projects collect similar agreements from contributors.
Please read this document carefully before signing and keep a copy for your records. (You'll get an email confirmation when you electronically sign the CLA.) If