NEWS: update change log

NEWS

 ver 0.15 - (200?/??/??)
+* input:
+  - parse Icy-Metadata
+* tags:
+  - support the "album artist" tag
+  - parse RVA2 tags in mp3 files
+* decoders:
+  - audiofile: streaming support added
+  - ffmpeg: enable WAV
+  - modplug: another MOD plugin, based on libmodplug
+  - mikmod disabled by default, due to severe security issues in libmikmod
+* audio outputs:
+  - shout: enlarged buffer size to 32 kB
+* commands:
+  - "playlistinfo" supports a range now
+  - added "sticker database", command "sticker", which allows clients
+    to implement features like "song rating"
 * Rewritten mixer code to support multiple mixers
 * Add audio archive extraction support:
   - bzip2
   - iso9660
   - zip
-* Add RVA2 tag support
 * the option "error_file" was removed, all messages are logged into
   "log_file"
 * support logging to syslog
 * fall back to XDG music directory if no music_directory is configured
 * failure to read the state file is non-fatal
-* added Icy-Metadata support
 * --create-db starts the MPD daemon instead of exiting
 * playlist_directory and music_directory are optional