Added upgrade guide

docs/usage/connection.md

-# Connection
\ No newline at end of file

docs/usage/upgrade_guide.md

+# Upgrade Guide
+
+## Autocomplete
+
+In the old versions, autocomplete was only possible through the use of the autocomplete button in the input line.
+
+<img src="/assets/images/autocomplete_old.png" alt="Old Autocomplete Example" style="max-width: 50%">
+
+Nowadays, there are many possible solutions for autocomplete:
+
+1. **Prefix Autocomplete**  
+  <img src="/assets/images/autocomplete_new_prefix.png" alt="New Autocomplete Example With Prefix" style="max-width: 50%">  
+  When typing an @ or # with the name of a nick or channel afterwards, Quasseldroid automatically recommends
+  You can also configure this to always autocomplete even without prefix
+
+2. **Double-Tap to Autocomplete**  
+  <img src="/assets/images/autocomplete_new_doubletap.png" alt="New Autocomplete Example With Doubletap" style="max-width: 50%">  
+  When typing a name, you can double-tap the input box to autocomplete the name
+
+3. **Autocomplete Button**  
+  <img src="/assets/images/autocomplete_new_button.png" alt="New Autocomplete Example With Button" style="max-width: 50%">  
+  Of course, the good old autocomplete button can be re-enabled again, too.
+
+## Avatars
+
+Quasseldroid nows display sender icons in messages, chat lists, the header, and notifications.
+
+You can enable Avatar fallbacks to load avatars for users if they are using Matrix or IRCCloud, or have a gravatar email
+in their realname field.
+
+Avatars can be configured to be square or round, and additionally, you can disable the avatars in the message list as
+well.
+
+## Highlights & Unread Activity
+
+In Quassel 0.13, highlights and unread activity are managed by the core. This means you won’t ever miss a highlight.
+Additionally, your client only has to load unread messages of the channels you actually open, saving traffic and
+improving performance.
+
+Quasseldroid relies on this functionality for showing highlights and unread activity, as well as configuring highlights.
+Accordingly, a Quassel 0.13 Core is now required for this functionality to work.
\ No newline at end of file

mkdocs.yml

@@ -5,12 +5,12 @@ site_author: 'Janne Koschinski'
 site_url: 'https://quasseldroid.info/docs/'
 
 # Copyright
-copyright: 'Copyright © 2018 Janne Koschinski'
+copyright: 'Copyright © 2019 Janne Koschinski'
 
-pages:
+nav:
   - "Overview": index.md
   - "Usage":
-    - "Connection": usage/connection.md
+    - "Upgrade Guide": usage/upgrade_guide.md
   - "Protocol":
     - "Serialization":
       - "Primitive Types": protocol/serialization/primitive.md