Mediator: add member current_music_section

Author: eoma

ly/musicxml/ly2xml_mediator.py

@@ -44,6 +44,10 @@ def __init__(self):
         self.sections = []
         """ default and initial values """
         self.insert_into = None
+
+        # Current music section are useful when using "\addlyrics"
+        self.current_music_section = None
+
         self.current_note = None
         self.current_lynote = None
         self.current_is_rest = False
@@ -92,6 +96,8 @@ def new_header_assignment(self, name, value):
     def new_section(self, name, glob=False):
         name = self.check_name(name)
         section = xml_objs.ScoreSection(name, glob)
+
+        self.current_music_section = section
         self.insert_into = section
         self.sections.append(section)
         self.bar = None
@@ -150,6 +156,8 @@ def new_part(self, pid=None, to_part=None, piano=False):
                 self.group.partlist.append(self.part)
             else:
                 self.score.partlist.append(self.part)
+
+        self.current_music_section = self.part
         self.insert_into = self.part
         self.bar = None