use strings to connect nodes

This makes the node system somewhat more high-level with the intent of making
working with them far more flexible and stable. By making the architecture more
abstracted, it becomes far less rigid which should allow us to do even more
with it and make it much less crash prone.

app/node/value.cpp

@@ -20,13 +20,13 @@
 
 #include "value.h"
 
+#include <QCoreApplication>
 #include <QMatrix4x4>
 #include <QVector2D>
 #include <QVector3D>
 #include <QVector4D>
 
 #include "common/tohex.h"
-#include "node/input.h"
 #include "render/color.h"
 
 namespace olive {
@@ -311,26 +311,6 @@ QString NodeValue::GetPrettyDataTypeName(Type type)
   return QCoreApplication::translate("NodeValue",  "Unknown");
 }
 
-NodeValueTable &NodeValueDatabase::operator[](const NodeInput *input)
-{
-  return tables_[input->id()];
-}
-
-void NodeValueDatabase::Insert(const NodeInput *key, const NodeValueTable &value)
-{
-  tables_.insert(key->id(), value);
-}
-
-NodeValueTable NodeValueDatabase::Merge() const
-{
-  QHash<QString, NodeValueTable> copy = tables_;
-
-  // Kinda hacky, but we don't need this table to slipstream
-  copy.remove(QStringLiteral("global"));
-
-  return NodeValueTable::Merge(copy.values());
-}
-
 NodeValue NodeValueTable::GetWithMeta(const QVector<NodeValue::Type> &type, const QString &tag) const
 {
   int value_index = GetInternal(type, tag);