Update contributing and readme with proposed changes from #92

CONTRIBUTING.md

@@ -1,12 +1,25 @@
 # Contribute to `optimade-python-tools`
 
-The Materials-Consortia is very open to contributions to this package.
+The [Materials Consortia](https://github.com/Materials-Consortia) is very open to contributions to this package.
+
 This may be anything from simple feedback and raising [new issues](https://github.com/Materials-Consortia/optimade-python-tools/issues/new) to creating [new PRs](https://github.com/Materials-Consortia/optimade-python-tools/compare).
 
 We have below recommendations for setting up an environment in which one may develop the package further.
 
 ## Development installation
 
+The core dependencies of this package can be found in `requirements.txt` with
+at the latest supported version. Individual backends and their supported
+versions can be found in `setup.py`. The following "extra" install modes are
+currently supported: `all`, `dev`, `server`, `testing`, `django`, `elastic` and `mongo`.
+
+When contributing to the Python code, please use the
+[black](https://github.com/ambv/black) code formatter. The
+[flake8](http://flake8.pycqa.org/en/latest/) linter will be run automatically on
+all PRs.
+
+
+
 ```shell
 # Clone this repository to your computer
 git clone git@github.com:Materials-Consortia/optimade-python-tools.git
@@ -42,8 +55,6 @@ open http://localhost:5000/docs
 open http://localhost:5000/openapi.json
 ```
 
-When contributing to the Python code, please use the [black](https://github.com/ambv/black) code formatter.
-
 ## Getting Started with Filter Parsing and Transforming
 
 Example use:

README.md

@@ -15,6 +15,11 @@ This repository contains a library of tools for implementing and consuming [OPTi
 
 Both the OPTiMaDe specification and this repository are **under development**.
 
+## Installation & Contributing
+
+See [CONTRIBUTING](CONTRIBUTING.md).
+
+
 ## Links
 
 * [OPTiMaDe Specification](https://github.com/Materials-Consortia/OPTiMaDe/blob/develop/optimade.rst), the human-readable specification that this library is based on.
@@ -24,6 +29,3 @@ Both the OPTiMaDe specification and this repository are **under development**.
 * [FastAPI](https://fastapi.tiangolo.com/), the framework used for generating the reference implementation from the [`openapi.json`](openapi.json) specification.
 * [lark](https://github.com/lark-parser/lark), the library used to parse the filter language in OPTiMaDe queries.
 
-## Developing
-
-See [CONTRIBUTING](CONTRIBUTING.md).