Add license badge in README. Fixes #118

README.md

@@ -1,6 +1,7 @@
 # benchcab
 
-[![Documentation status][readthedocs_badge]][docs] [![Test coverage][codecov_badge]][codecov_summary] [![Conda package status][conda_badge]][conda]
+[![Documentation status][readthedocs_badge]][docs] [![Test coverage][codecov_badge]][codecov_summary] [![Conda package status][conda_badge]][conda] [![GitHub License][license_badge]][license]
+
 
 `benchcab` is a testing framework that tests the CABLE land surface model across a range of model configurations and model versions. The tool:
 - checks out the model versions specified by the user
@@ -18,8 +19,10 @@ The full documentation is available at [benchcab.readthedocs.io][docs].
 
 [conda_badge]: https://img.shields.io/conda/v/accessnri/benchcab
 [codecov_badge]: https://codecov.io/gh/CABLE-LSM/benchcab/branch/master/graph/badge.svg?token=JJYE1YZDXQ
-[readthedocs_badge]: https://readthedocs.org/projects/benchcab/badge
+[readthedocs_badge]: https://readthedocs.org/projects/benchcab/badge/?version=stable
+[license_badge]: https://img.shields.io/github/license/CABLE-LSM/benchcab
 [conda]: https://anaconda.org/accessnri/benchcab
 [codecov_summary]: https://codecov.io/gh/CABLE-LSM/benchcab
 [docs]: https://benchcab.readthedocs.io
+[license]: https://github.com/CABLE-LSM/benchcab/blob/main/LICENSE
 [meorg]: https://modelevaluation.org