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/curvewidget/curvewidget.cpp

@@ -215,9 +215,7 @@ void CurveWidget::UpdateBridgeTime(const int64_t &timestamp)
 
 void CurveWidget::ConnectNode(Node *n)
 {
-  QVector<NodeInput*> inputs = n->GetInputsIncludingArrays();
-
-  foreach (NodeInput* i, inputs) {
+  foreach (NodeInput* i, n->parameters()) {
     if (tree_view_->IsInputEnabled(i)) {
       view_->ConnectInput(i);
     }