don't police data type connections between nodes

Nodes were previously written to be "strongly typed" in that a parameter's
"type" enforced whether it could be connected to another. All code related
to that has now been removed since not only is it hard to maintain and
likely unnecessary, it's possible the nodes will work differently later on
anyway.

app/widget/nodeview/nodeviewitem.cpp

@@ -379,8 +379,7 @@ void NodeViewItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
         // Get the parameter we're dragging into
         NodeParam* comp_param = drop_item->node()->parameters().at(i);
 
-        if (param_hitbox.contains(drop_item->mapFromScene(event->scenePos())) // See if we're dragging inside the hitbox
-            && NodeParam::AreDataTypesCompatible(drag_src_param_, comp_param)) { // Make sure the types are compatible
+        if (param_hitbox.contains(drop_item->mapFromScene(event->scenePos()))) { // See if we're dragging inside the hitbox
 
           // Prevent circular dependency - check if the Node we'll be outputting to already outputs to this Node
           Node* outputting_node;