Improve diaspora* entry

Fix name branding, add link to (random) community server for demo, add source code link, add main programming language.

README.md

@@ -186,7 +186,7 @@ Some [Groupware](#groupware) solutions also feature calendar/address book editin
   * [Anahita](https://www.getanahita.com/) Open Source Social Networking Framework & Platform. ([Source code](https://github.com/anahitasocial) - `GPLv3` `PHP`
   * [Bootcamp](http://trybootcamp.vitorfs.com) - An enterprise social network - [Source code](https://github.com/vitorfs/bootcamp)
   * [BuddyPress](http://buddypress.org/about/) - A powerful plugin that takes your WordPress.org powered site beyond the blog with social-network features like user profiles, activity streams, user groups, and more.
-  * [Diaspora](https://diasporafoundation.org/) - Distributed social networking service. - `AGPLv3`
+  * [diaspora*](https://diasporafoundation.org/) - Distributed social networking server. ([Demo](http://podupti.me/random.php), [Source Code](https://github.com/diaspora/diaspora)) - `AGPLv3` `Ruby`
   * [Discourse](http://www.discourse.org/) - Advanced forum / community solution based on Ruby and JS - `GPLv2`
   * [Elgg](https://www.elgg.org/) - a powerful open source social networking engine - `GPLv2`
   * [Flarum](http://flarum.org) - Delightfully simple forums. Flarum is the next-generation forum software that makes online discussion fun again. ([Source Code](https://github.com/flarum/flarum)) - `MIT` `PHP`