README file added

README.md

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+# OIDC Library Portal
+
+**OIDC Library Portal** provides the portal related implementation shared classes for OpenId Connect (OIDC) use in gCube framework
+
+## Structure of the project
+
+The source code is present in `src` folder. 
+
+## Built With
+
+* [OpenJDK](https://openjdk.java.net/) - The JDK used
+* [Maven](https://maven.apache.org/) - Dependency Management
+
+## Documentation
+
+To build the library JAR it is sufficient to type
+
+    mvn clean package
+
+## Change log
+
+See [Releases](https://code-repo.d4science.org/gCubeSystem/authorization-client/releases).
+
+## Authors
+
+* **Mauro Mugnaini** ([Nubisware S.r.l.](http://www.nubisware.com)
+
+## License
+
+This project is licensed under the EUPL V.1.1 License - see the [LICENSE.md](LICENSE.md) file for details.
+
+
+## About the gCube Framework
+This software is part of the [gCubeFramework](https://www.gcube-system.org/ "gCubeFramework"): an
+open-source software toolkit used for building and operating Hybrid Data
+Infrastructures enabling the dynamic deployment of Virtual Research Environments
+by favouring the realisation of reuse oriented policies.
+ 
+The projects leading to this software have received funding from a series of European Union programmes including:
+
+- the Sixth Framework Programme for Research and Technological Development
+    - DILIGENT (grant no. 004260);
+- the Seventh Framework Programme for research, technological development and demonstration 
+    - D4Science (grant no. 212488), D4Science-II (grant no.239019), ENVRI (grant no. 283465), EUBrazilOpenBio (grant no. 288754), iMarine(grant no. 283644);
+- the H2020 research and innovation programme 
+    - BlueBRIDGE (grant no. 675680), EGIEngage (grant no. 654142), ENVRIplus (grant no. 654182), Parthenos (grant no. 654119), SoBigData (grant no. 654024),DESIRA (grant no. 818194), ARIADNEplus (grant no. 823914), RISIS2 (grant no. 824091), PerformFish (grant no. 727610), AGINFRAplus (grant no. 731001);
+