[doc] improve README: add Cesium Website, Use GitLab links

- link to XMPP web client, list GVA, remove dead OpenUDC website

README.md

@@ -9,44 +9,40 @@ Inspired by [Bitcoin](https://github.com/bitcoin/bitcoin) and [OpenUDC](https://
 <p align="center"><img src="https://git.duniter.org/nodes/typescript/duniter/raw/dev/images/duniter_admin_g1.png" /></p>
 
 ## Development state
-
 [Ğ1, first libre currency for production using Duniter have been launched March 8th 2017](https://en.duniter.org/g1-go/).
 
 However, we are running simultaneously a testing currency.
 
 ### Add your node to the network
-
 See [Install a node documentation](https://duniter.org/en/wiki/duniter/install/).
 
 ### Clients, wallets
 #### Cesium
-- [Repository](https://github.com/duniter/cesium)
+- [Website](https://cesium.app/)
+- [Repository](https://git.duniter.org/clients/cesium-grp/cesium)
 
 #### Sakia
 - [Website](http://sakia-wallet.org)
-- [Repository](https://github.com/duniter/sakia)
+- [Repository](https://git.duniter.org/clients/python/sakia)
 
 #### Silkaj
 - [Website](https://silkaj.duniter.org)
-- [Repository](https://github.com/duniter/silkaj)
+- [Repository](https://git.duniter.org/clients/python/silkaj)
 
 ## Going further
-
 ### Contribute
-
-- [Quick-start-guide : start a duniter node with web-ui from source](https://github.com/duniter/duniter/blob/master/doc/quick-start.md)
-- [Guide (fr)](https://github.com/duniter/duniter/blob/master/doc/contribute-french.md)
+- [Quick-start-guide : start a duniter node with web-ui from source](https://git.duniter.org/nodes/typescript/duniter/blob/dev/doc/quick-start.md)
+- [Guide (fr)](https://git.duniter.org/nodes/typescript/duniter/blob/dev/doc/contribute-french.md)
+- [Developer guide](https://git.duniter.org/nodes/typescript/duniter/blob/dev/doc/developer-guide.md)
 
 ### Documentation
-
 Visit [Duniter website](https://duniter.org): it gathers theoretical informations, FAQ and several useful links. If you want to learn, this is the first place to visit.
 
 ### Talk about/get involved in Duniter project
-
 If you wish to participate/debate on Duniter, you can:
 
 * visit [Duniter Forum](https://forum.duniter.org)
-* join XMPP chatroom [duniter@muc.duniter.org](https://chat.duniter.org)
+* join [XMPP chatroom](https://chat.duniter.org) [xmpp://duniter@muc.duniter.org](xmpp://duniter@muc.duniter.org)
 * contact us directly at [contact@duniter.org](mailto:contact@duniter.org)
 * subscribe to [a mailing list for Duniter node's administrators](https://listes.aquilenet.fr/sympa/subscribe/duniter-node-admins)
 
@@ -54,25 +50,22 @@ If you wish to participate/debate on Duniter, you can:
 Duniter is using modules on different git repositories:
 - [WotB](https://github.com/duniter/wotb): compute Web of Trust.
 - [Debug](https://github.com/duniter/duniter-debug): debug tool.
-- [Web admin](https://github.com/duniter/duniter-ui): web administration interface (optional).
+- [Web admin](https://git.duniter.org/nodes/typescript/modules/duniter-ui): web administration interface (optional).
+- [GVA](https://git.duniter.org/nodes/typescript/modules/gva-api): Future client API aimed to replace BMA. GVA stands for GraphQL Validation API.
 
 Optional modules:
-- [Currency monit](https://github.com/duniter/duniter-currency-monit): charts to monitor currency and web of trust state.
+- [Currency monit](https://git.duniter.org/nodes/typescript/modules/duniter-currency-monit): charts to monitor currency and web of trust state.
 - [Remuniter](https://github.com/duniter/remuniter): service to remunerate blocks issuers.
 - [Wot explorer](https://github.com/c-geek/wotex): Web of Trust explorer.
 
 # References
-
 ## Theoretical
-* [[en] Relative theory of money](http://en.trm.creationmonetaire.info)
-* [[fr] Théorie relative de la monnaie](http://trm.creationmonetaire.info)
+* [(en) Relative theory of money](http://en.trm.creationmonetaire.info)
+* [(fr) Théorie relative de la monnaie](http://trm.creationmonetaire.info)
 
 ## OpenUDC
-
-* [Official OpenUDC project website](http://www.openudc.org)
-* [Official OpenUDC repository](https://github.com/Open-UDC/open-udc)
+* [OpenUDC repository](https://github.com/Open-UDC/open-udc)
 * [Other project trying to implement OpenUDC in python](https://github.com/canercandan/django-openudc)
 
 # License
-
-This software is distributed under [GNU AGPLv3](https://raw.github.com/duniter/duniter/master/LICENSE).
+This software is distributed under [GNU AGPLv3](https://git.duniter.org/nodes/typescript/duniter/blob/dev/LICENSE).