began new infrastructure

Yep, this is another one of my "famous" sweeping rewrites. Expect things to break.

Goals for this are:
- Greatly simplify node connections (particularly with arrays) so the code requires less maintenance/is more stable
- Redesign node structure to address issues where UI would stall for lengthy periods of time
- Less reliance on shared ptrs/greater reliance on QObject system for inheritance/memory management
- General code cleanup and improvements

app/widget/nodeparamview/nodeparamviewwidgetbridge.h

@@ -41,7 +41,7 @@ class NodeParamViewWidgetBridge : public QObject, public TimeTargetObject
 {
   Q_OBJECT
 public:
-  NodeParamViewWidgetBridge(NodeInput* input, QObject* parent);
+  NodeParamViewWidgetBridge(NodeInput* input, int element, QObject* parent);
 
   void SetTime(const rational& time);
 
@@ -64,6 +64,8 @@ private:
 
   NodeInput* input_;
 
+  int element_;
+
   QList<QWidget*> widgets_;
 
   rational time_;