Prepared download table for 2.1.

src/site/markdown/downloads.md

@@ -44,6 +44,13 @@ internal mechanism will download automatically all artifacts and dependencies
 as required.
 
 
+|  package |                                              link                                                         |
+|----------|-----------------------------------------------------------------------------------------------------------|
+|  source  | rugged-2.1-sources.zip (URL to be defined after official release)                                         |
+|  binary  | rugged-2.1.jar (URL to be defined after official release)                                                 |
+|  javadoc | rugged-2.1-javadoc.jar (URL to be defined after official release)                                         |
+version 2.1 downloads (release date: 2019-03-14)
+
 |  package |                                              link                                                         |
 |----------|-----------------------------------------------------------------------------------------------------------|
 |  source  | [`rugged-2.0-sources.zip`](https://gitlab.orekit.org/orekit/rugged/uploads/f7f30111d4d3cef19636cb7c504530dd/rugged-2.0-sources.zip)    |