timeline: implemented in/out points

app/timeline/timelinepoints.cpp

@@ -0,0 +1,21 @@
+#include "timelinepoints.h"
+
+TimelineMarkerList *TimelinePoints::markers()
+{
+  return &markers_;
+}
+
+const TimelineMarkerList *TimelinePoints::markers() const
+{
+  return &markers_;
+}
+
+const TimelineWorkArea *TimelinePoints::workarea() const
+{
+  return &workarea_;
+}
+
+TimelineWorkArea *TimelinePoints::workarea()
+{
+  return &workarea_;
+}