Improve README (#17)

* Add badges to README

* Include features, install and license

README.rst

@@ -1,4 +1,56 @@
 ambient
 =======
 
-ambient is a building physics python library.
+|travis| |codecov| |readthedocs| |license| |black|
+
+*ambient* is a building physics and simulation Python library.
+
+The aims of *ambient* are to be:
+
+#. Simple: Provide intuitive defaults to get started quickly.
+#. Modular: Simulate only the parts you are interested in.
+#. Extensible: Enable users to create and modify their own components.
+#. Open: Provide an open-source building simulation library.
+
+Features
+--------
+
+*ambient* currently offers modules for the analysis of:
+
+- Layered constructions (including steady-state and dynamic response)
+- Solar conditions (including design day calculations)
+- Psychrometrics of moist air
+
+Simulations can be read from, and written to, JSON format for persistence.
+
+Installation
+------------
+
+Install *ambient* in a virtual environment using:
+
+.. code-block:: python
+
+   pip install ambient
+
+License
+-------
+
+*ambient* is licensed under the terms of the Apache License, Version 2.0.
+Refer to the `LICENSE <https://github.com/drewyh/ambient/blob/master/LICENSE>`__
+file for details.
+
+.. |travis| image:: https://travis-ci.com/drewyh/ambient.svg?branch=master
+             :target: https://travis-ci.com/drewyh/ambient
+
+.. |codecov| image:: https://codecov.io/gh/drewyh/ambient/branch/master/graph/badge.svg
+              :target: https://codecov.io/gh/drewyh/ambient
+
+.. |readthedocs| image:: https://readthedocs.org/projects/ambient/badge/?version=latest
+                  :target: https://ambient.readthedocs.io/en/latest/?badge=latest
+                  :alt: Documentation Status
+
+.. |black| image:: https://img.shields.io/badge/code%20style-black-000000.svg
+            :target: https://github.com/psf/black
+
+.. |license| image:: https://img.shields.io/pypi/l/ambient
+              :alt: PyPI - License

setup.cfg

@@ -4,7 +4,7 @@ description = A package for building engineering physics
 long_description = file:README.rst
 long_description_content_type = text/x-rst
 keywords = building engineering physics, psychrometrics
-license = Apache License, Version 2
+license = Apache License 2.0
 classifiers =
     Topic :: Scientific/Engineering :: Physics
     License :: OSI Approved :: Apache Software License