Switch to MIT and Apache Dual License

Fixes #41

LICENSE-MIT

@@ -0,0 +1,19 @@
+The MIT License (MIT)
+Copyright (c) 2017-2018 Yong Wen Chua
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

@@ -41,3 +41,10 @@ rocket_cors = { git = "https://github.com/lawliet89/rocket_cors", branch = "mast
 ## Reference
 
 - [W3C CORS Recommendation](https://www.w3.org/TR/cors/#resource-processing-model)
+
+## License
+
+Rocket is licensed under either of the following, at your option:
+
+- 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)