+1.3.85.jcn4
+===========
+
+* Added clone () to music iterators, so that we can do next () on a copy.
+
+1.3.85.jcn3
+===========
+
+* Added get_music () and next () to music iterators.
+
+1.3.85
+======
* Separated definition and implementation of contexts (moved
definition out of Translator_group into Translator_def)