Merge pull request #2 from Stedi/zk-readme

dual license -> single license

README.md

@@ -137,19 +137,10 @@ cargo test testsuite
 
 In `tests/testsuite/groups` are the tests groups that are passing, while `tests/testsuite/skip` contains the groups that still require feature implementation. There may be tests in the remaining groups that do pass, but I don't want to split them up - only when a test group fully passes is it moved.
 
-## License
-
-Licensed under either of
-
-- Apache License, Version 2.0
-  ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
-- MIT license
-  ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
+## Contribution
 
-at your option.
+We welcome community contributions and pull requests.
 
-## Contribution
+## License
 
-Unless you explicitly state otherwise, any contribution intentionally submitted
-for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
-dual licensed as above, without any additional terms or conditions.
+This project is licensed under the Apache-2.0 License. Any code you submit will be released under that license.