Update to 0.5.2

Author: KlausBlum

update/release-notes.txt

@@ -1,9 +1,23 @@
-OooLilyPond 0.5.1 Public Release  (March 2017)
+OOoLilyPond 0.5.2 Release Notes (March 2017)
 =============================================
 
+Hint: If you tried to download the update via the extension manager and got a "403 Forbidden" error message, just try once more.
+
+
+Changes to OOoLilyPond 0.5.2 since 0.5.1:
+
+* fixed: runtime error if path for language files could not be found
+* new: path for language files can be specified in config dialog
+* for Linux users: new location for temporary files (now being .cache/ooolilypond/tmp instead of .ooolilypond-tmp - you can delete the latter if you want to get rid of it).
+
+There have also been some minor changes to the language files. So, after updating to 0.5.2, please open the config dialog and click the "Restore Language Files" button. 
+(Your current language files will be backed up in a subfolder. If you like, you can delete that subfolder.
+
+
 Changes to OOoLilyPond 0.5.1 since 0.5.0:
 
 *   fixed: missing parentheses in source code caused runtime error in LibO 5.3.1.2
+(Apparently, LibreOffice 5.3.1.2 has a more strict syntax checking whereas earlier versions silently ignored that.)
 
 
 Changes to OOoLilyPond 0.5.0 since 0.4.0/0.4.1: