Added MIT licence

LICENSE

@@ -0,0 +1,21 @@
+The MIT License
+
+Copyright 2022 The University of Sheffield
+
+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

@@ -34,3 +34,7 @@ docker run -it --rm --entrypoint /bin/bash ghcr.io/gatenlp/chemdataextractor:mai
 ## Building the GATE Cloud Pipeline
 
 The GATE Cloud pipeline is then a thin wrapper which calls the ELG endpoint using the ELG client PR.  To build this, run `./gradlew cloudZip` in the `cloud-pipeline` directory and the zip file will be created under `build/distributions`.
+
+## Licence
+
+The code in this repository is licenced under the [MIT licence](LICENSE), as is [ChemDataExtractor](https://github.com/mcs07/ChemDataExtractor) itself.