Update README.rst.

README

-Open source Jabber (XMPP) client with multi-account support and clean and simple interface. Being both free (as in freedom!) and ad-free, Xabber is designed to be the best Jabber client for Android.

README.rst

+Xabber - XMPP client for Android
+================================
+
+Open source Jabber (XMPP) client with multi-account support, clean and simple interface.
+Being both free (as in freedom!) and ad-free, Xabber is designed to be the best Jabber client for Android.
+
+Supported protocols
+===================
+
+* RFC-3920: Core
+* RFC-3921: Instant Messaging and Presence
+* XEP-0030: Service Discovery
+* XEP-0128: Service Discovery Extensions
+* XEP-0115: Entity Capabilities
+* XEP-0054: vcard-temp
+* XEP-0153: vCard-Based Avatars
+* XEP-0045: Multi-User Chat (incompletely)
+* XEP-0078: Non-SASL Authentication
+* XEP-0138: Stream Compression
+* XEP-0203: Delayed Delivery
+* XEP-0091: Legacy Delayed Delivery
+* XEP-0199: XMPP Ping
+* XEP-0147: XMPP URI Scheme Query Components
+* XEP-0085: Chat State Notifications
+* XEP-0184: Message Delivery Receipts
+* XEP-0155: Stanza Session Negotiation
+* XEP-0059: Result Set Management
+* XEP-0136: Message Archiving
+* XEP-0224: Attention
+
+Translations
+============
+
+We use webtranslateit.com as our translation system.
+All related resources are automatically generated from files got with webtranslateit.com.
+If you want to update any translation please email us to info[at]xabber.com and specify all the translation languages you want to edit.
+Then we'll send an invitation to our project on webtranslateit.com.
+Please don't create pull requests with translation fixes as any changes will be overwritten with the next update from webtranslateit.com.