add logo, fix broken links in readme and add cite us

README.md

-# eossr
+![eOSSR](docs/images/eossr_logo.png)
+
+## The ESCAPE OSSR library
+
+* Code: [https://gitlab.in2p3.fr/escape2020/wp3/eossr](https://gitlab.in2p3.fr/escape2020/wp3/eossr)
+* Documentation: [https://escape2020.pages.in2p3.fr/wp3/eossr/](https://escape2020.pages.in2p3.fr/wp3/eossr/)
+
+
 
 [![pipeline status](https://gitlab.in2p3.fr/escape2020/wp3/eossr/badges/master/pipeline.svg)](
 https://gitlab.in2p3.fr/escape2020/wp3/eossr/-/commits/master)
@@ -9,11 +16,6 @@ https://gitlab.in2p3.fr/escape2020/wp3/eossr/-/commits/master)
 [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/git/https%3A%2F%2Fgitlab.in2p3.fr%2Fescape2020%2Fwp3%2Feossr/HEAD)
 
 
-ESCAPE OSSR library
-
-* Code: https://gitlab.in2p3.fr/escape2020/wp3/eossr
-* Documentation: https://escape2020.pages.in2p3.fr/wp3/eossr/ 
-
 
 ## Versions
 
@@ -40,3 +42,7 @@ docker run -it gitlab-registry.in2p3.fr/escape2020/wp3/eossr:latest
 git clone https://gitlab.in2p3.fr/escape2020/wp3/eossr.git
 pip install eossr
 ```
+
+## Cite
+
+To cite this library, use the cite module in [the Zenodo page](https://zenodo.org/record/5524913#.YWBq79kzZB0).

docs/index.rst

@@ -3,7 +3,7 @@
    You can adapt this file completely to your liking, but it should at least
    contain the root `toctree` directive.
 
-Welcome to eossr's documentation!
+Welcome to eOSSR's documentation!
 =================================
 
 .. toctree::