README updates

- Add contributors and change-log labels
- Remove old acknowledgement

README.md

@@ -1,10 +1,12 @@
 # INDIGO Identity and Access Management (IAM) service
 
 [![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.3496834.svg)](https://doi.org/10.5281/zenodo.3496834)
+[![Change Log](https://img.shields.io/github/release/indigo-iam/iam.svg?label=changelog)](https://github.com/indigo-iam/iam/releases/latest)
 [![github-build-status](https://github.com/indigo-iam/iam/actions/workflows/maven.yml/badge.svg?branch=master&event=push)](https://github.com/indigo-iam/iam/actions/workflows/maven.yml)
 [![sonarqube-qg](https://sonarcloud.io/api/project_badges/measure?project=indigo-iam_iam&metric=alert_status)](https://sonarcloud.io/dashboard?id=indigo-iam_iam)
 [![sonarqube-coverage](https://sonarcloud.io/api/project_badges/measure?project=indigo-iam_iam&metric=coverage)](https://sonarcloud.io/dashboard?id=indigo-iam_iam)
 [![sonarqube-maintainability](https://sonarcloud.io/api/project_badges/measure?project=indigo-iam_iam&metric=sqale_rating)](https://sonarcloud.io/dashboard?id=indigo-iam_iam)
+[![Contributors](https://img.shields.io/github/contributors/indigo-iam/iam.svg)](https://github.com/indigo-iam/iam/graphs/contributors)
 
 The INDIGO IAM is an Identity and Access Management service first developed in the
 context of the INDIGO-Datacloud Horizon 2020 project, and currently maintained and
@@ -37,10 +39,6 @@ See the [contributing](CONTRIBUTING.md) document.
 
 ## Acknowledgements
 
-This work is co-funded by the [EOSC-hub project (Horizon 2020)][eosc-hub] under Grant number 777536.
-<img src="https://wiki.eosc-hub.eu/download/attachments/18973612/EU-logo-mini.png?version=2&modificationDate=1603899760369&api=v2" height="24">
-<img src="https://wiki.eosc-hub.eu/download/attachments/18973612/eosc-hub-web.png?version=1&modificationDate=1516099993132&api=v2" height="24">
-
 INDIGO IAM developers use [YourKit Java Profiler](http://www.yourkit.com/) to provide useful insights into the performance of this Java application. 
 <img src="https://www.yourkit.com/images/yklogo.png" height="24">