Add a bare-bones README file. To be improved when the project is more…

… mature.

README.md

@@ -0,0 +1,10 @@
+# OM3Utils
+
+*A Python package of various utilities for the [ACCESS-OM3](https://github.com/COSIMA/access-om3) coupled ocean - sea ice - wave model.*
+
+![CI](https://github.com/COSIMA/om3-utils/actions/workflows/ci.yml/badge.svg) [![License](https://img.shields.io/badge/License-MPL2.0-a05a3f?style=flat-square)](https://opensource.org/licenses/MPL-2.0) [![codecov](https://codecov.io/gh/COSIMA/om3-utils/graph/badge.svg?token=gWLm5kXMcb)](https://codecov.io/gh/COSIMA/om3-utils) [![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
+
+Collection of utilities aimed at simplifying the creation and handling of ACCESS-OM3 runs. It currently includes:
+  - functions to read and write ACCESS-OM3 configuration files
+  - functions to read and process profiling data
+  -