ChangeLog for 2.3 additions

ChangeLog

@@ -1,10 +1,11 @@
 ChangeLog
 =========
 
-version 2.3.0 (2017-0x-xx)
-* WiP!
-* WiP Switch Windows and OS X build to 5.6.2
-* WiP Performance improvements for exclude detection
+version 2.3.0 (2017-02-xx)
+* Decreased memory usage during sync
+* Overlay icons: Lower CPU usage
+* Allow to not sync the server's external storages by default
+* Switch Windows and OS X build to 5.6.2
 * Switch to new ownCloud server WebDAV endpoint
 * Chunking NG: New file upload chunking algorithmn for ownCloud server 9.2
 * Allow to sync a folder to multiple different servers (Filename change from .csync_journal.db to _sync_$HASH.db)