+- [ ] Checked the code with [flake8](https://pypi.python.org/pypi/flake8)
+
+### In order to be accepted and merged into youtube-dl each piece of code must be in public domain or released under [Unlicense](http://unlicense.org/). Check one of the following options:
+- [ ] I am the original author of this code and I am willing to release it under [Unlicense](http://unlicense.org/)
+- [ ] I am not the original author of this code but it is in public domain or released under [Unlicense](http://unlicense.org/) (provide reliable evidence)