implement entire project in nodes

Project items are now represented directly in nodes opening up more versatility and possibilities. This is the first iteration of this and will be buggy. Need to test thoroughly.

app/widget/timelinewidget/tool/ripple.cpp

@@ -58,7 +58,7 @@ void RippleTool::InitiateDrag(Block *clicked_item,
   }
 
   // For each track that does NOT have a ghost, we need to make one for Gaps
-  foreach (Track* track, parent()->GetConnectedNode()->GetTracks()) {
+  foreach (Track* track, sequence()->GetTracks()) {
     if (track->IsLocked()) {
       continue;
     }
@@ -144,7 +144,7 @@ void RippleTool::FinishDrag(TimelineViewMouseEvent *event)
 
     for (int i=0;i<info_list.size();i++) {
       if (!info_list.at(i).isEmpty()) {
-        command->add_child(new TrackListRippleToolCommand(parent()->GetConnectedNode()->track_list(static_cast<Track::Type>(i)),
+        command->add_child(new TrackListRippleToolCommand(sequence()->track_list(static_cast<Track::Type>(i)),
                                                           info_list.at(i),
                                                           movement,
                                                           drag_movement_mode()));