Thanks for your interest in the Source SDK 2013 project. When you make a contribution to the project (e.g. create an Issue or submit a Pull Request) (a "Contribution"), Valve wants to be able to use your Contribution to improve the SDK and other Valve products. As a condition of providing a Contribution, you agree that: - You grant Valve a non-exclusive, irrevocable, royalty-free, worldwide license to make, use, sell, reproduce, modify, distribute (directly and indirectly), and publicly display and perform the Contribution, and any derivative works that Valve may make from the Contribution, under any intellectual property you own or have the right to license. - You warrant and represent that the Contribution is your original creation, that you have the authority to grant this license to Valve, and that this license does not require the permission of any third party. Otherwise, you provide your Contribution "as is" without warranties. Should you wish to submit a suggestion or work that is not your original creation, you may submit it to Valve separate from any Contribution, explicitly identifying it as sourced from a third party, stating the details of its origin, and informing Valve of any license or other restriction of which you are personally aware. Technical Guidelines for Contributions: * Please keep your pull requests as granular as possible. Including two or three unrelated things in a single pull request just makes it less likely that the uber-request will be accepted. Two small pull requests are usually bettern than one large pull request. * If you are including a pull request with warning fixes, please include the following information about the warning: . The OS and version you are building on . The Compiler and version you are using . The text of the warning (or group of warnings) itself