data: saving typedef to Storage

This change save typedef expressions to the Storage using a node of type Node::NODE_TYPEDEF and an edge of type
Edge::EDGE_TYPEDEF_OF that leads to the original type, with the qualifiers saved as DataType on the edge.

bin/app/data/src/header.h

@@ -13,6 +13,10 @@ y fooy();
 z fooz();
 */
 
+class A {};
+class B : public A {};
+typedef A* C;
+
 const bool *ab(int a, int b);
 
 bool const *abc(int a, int b);
@@ -23,6 +27,3 @@ int main();
 void foo();
 int sum(int a, int b);
 int diff(int a, int b);
-
-class A {};
-class B : public A {};