Update README for version 0.4.0

Author: pafonta

README.md

@@ -1,3 +1,48 @@
-# NeuroAnnotation toolbox (NAT)
+[Getting started](#getting-started) |
+[Releases](#releases) |
+[Status](#status)
 
-This project is a sprout from the NeuroCurator project which has been divided in a front-end (NeuroCurator) and a back-end (NAT) to provide more flexibility for programmatic interaction with created annotation corpora. This toolbox provides the necessary functions and utilities to reliably annotate the neuroscientific literature, curate published values for modeling parameters, and save them in reusable corpora.
+# NeuroAnnotation Toolbox (NAT)
+
+Python package to use the annotations created with [NeuroCurator](https://github.com/BlueBrain/neurocurator), for example in a [Jupyter](https://jupyter.org/) notebook.
+
+This framework has been described in details in the following open-access paper: https://doi.org/10.3389/fninf.2017.00027.
+
+NAT provides the necessary functions and utilities to reliably annotate the neuroscientific literature, curate published values for modeling parameters, and save them in reusable corpora.
+
+---
+
+## Getting started
+
+Install the latest version with:
+```
+pip install git+https://github.com/BlueBrain/nat
+```
+
+Install a specific version with:
+```
+pip install git+https://github.com/BlueBrain/nat.git@<tag>
+```
+(ex. '@v0.4.0')
+
+NB: You don't need to install NAT to use a packaged executable of NeuroCurator.
+
+## Releases
+
+In the [dedicated section](https://github.com/BlueBrain/nat/releases/), you can find:
+- the latest version,
+- the notable changes of each version.
+
+Releases are synchronized with the ones of NeuroCurator.
+
+## Status
+
+Created during 2016.
+
+Ongoing reengineering in the branch _refactor-architecture_.
+
+The branch _refactor-architecture_ is **not** intended to be used by end-users.
+
+New features, bug fixes and improvements are done on the reengineered code sections.
+
+When a reengineered code section is stable, it's merged into the branch _master_ and a release is published.