Merge pull request #102 from ebkalderon/clarify-license-disclaimer

Clarify wording of README license disclaimer

Author: ebkalderon

README.md

@@ -66,7 +66,8 @@ Working examples are available in the `examples` directory.
 ## License
 
 `renderdoc-rs` is free and open source software distributed under the terms of
-both the [MIT](LICENSE-MIT) and the [Apache 2.0](LICENSE-APACHE) licenses.
+either the [MIT](LICENSE-MIT) or the [Apache 2.0](LICENSE-APACHE) license, at
+your option.
 
 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