docs: Update changelog

docs/changelog.rst

@@ -69,6 +69,15 @@ of the following extensions as well:
 - Added :meth:`mopidy.core.CoreListener.mute_changed` event that is triggered
   when the mute state changes.
 
+- In "random" mode, after a full playthrough of the tracklist, playback
+  continued from the last track played to the end of the playlist in non-random
+  order. It now stops when all tracks have been played once, unless "repeat"
+  mode is enabled. (Fixes: :issue:`453`)
+
+- In "single" mode, after a track ended, playback continued with the next track
+  in the tracklis. It now stops after playing a single track, unless "repeat"
+  mode is enabled. (Fixes: :issue:`496`)
+
 **Audio**
 
 - Added support for parsing and playback of playlists in GStreamer.  For end
@@ -92,6 +101,11 @@ of the following extensions as well:
 
 - Media files with less than 100ms duration are now excluded from the library.
 
+- Unknown URIs found in playlists are now made into track objects with the URI
+  set instead of being ignored. This makes it possible to have playlists with
+  e.g. HTTP radio streams and not just ``local:track:...`` URIs. This used to
+  work, but was broken in Mopidy 0.15.0. (Fixes: :issue:`527`)
+
 **MPD frontend**
 
 - Made the formerly unused commands ``outputs``, ``enableoutput``, and