README: Fix broken links; put FIWARE badges in a table

Author: j1elo

README.md

@@ -28,9 +28,8 @@ All source code belonging to the Kurento project can be found in the [Kurento Gi
 
 ## FIWARE Platform
 
-[![FIWARE Chapter](https://nexus.lab.fiware.org/repository/raw/public/badges/chapters/media-streams.svg)](https://www.fiware.org/developers/catalogue/)
-[![FIWARE Member Status](https://nexus.lab.fiware.org/static/badges/statuses/kurento.svg)](https://www.fiware.org/developers/catalogue/)
-:mortar_board: [FIWARE Academy](https://fiware-academy.readthedocs.io/en/latest/processing/kurento)
+| [![FIWARE Chapter](https://nexus.lab.fiware.org/repository/raw/public/badges/chapters/media-streams.svg)](https://www.fiware.org/developers/catalogue/) | [![FIWARE Member Status](https://nexus.lab.fiware.org/static/badges/statuses/kurento.svg)](https://www.fiware.org/developers/catalogue/) | :mortar_board: [FIWARE Academy](https://fiware-academy.readthedocs.io/en/latest/processing/kurento) |
+| --- | --- | --- |
 
 The Kurento project is part of [FIWARE]. For more information check the FIWARE documentation for [Real-Time Media Stream Processing](https://fiwaretourguide.readthedocs.io/en/latest/processing/kurento/introduction/).
 
@@ -52,7 +51,7 @@ Kurento has been rated within [FIWARE] as follows:
 
 Kurento is also part of the [NUBOMEDIA](https://nubomedia.readthedocs.io/en/latest/) research initiative.
 
-The Open API specification, also known as [Kurento Protocol](https://doc-kurento.readthedocs.io/en/latest/features/kurento_api.html), is available at [Stream-oriented Open API](http://docs.streamoriented.apiary.io/).
+The Open API specification, also known as [Kurento Protocol](https://doc-kurento.readthedocs.io/en/latest/features/kurento_protocol.html), is available at [Stream-oriented Open API](http://docs.streamoriented.apiary.io/).
 
 [FIWARE]: https://www.fiware.org/
 
@@ -70,7 +69,7 @@ Usage:
 
 * [Installation Guide](https://doc-kurento.readthedocs.io/en/latest/user/installation.html)
 * [Docker Image](https://hub.docker.com/r/kurento/kurento-media-server)
-* [Contribution Guide](https://doc-kurento.readthedocs.io/en/latest/project/contribute.html)
+* [Contribution Guide](https://doc-kurento.readthedocs.io/en/latest/project/contributing.html)
 * [Developer Guide](https://doc-kurento.readthedocs.io/en/latest/dev/dev_guide.html)
 
 Issues:
@@ -81,7 +80,7 @@ Issues:
 News:
 
 * [Kurento Blog](https://kurento.openvidu.io/blog)
-* [Community Discussion](https://groups.google.com/forum/#!forum/kurento)
+* [Community Discussion](https://groups.google.com/g/kurento)
 
 Training: