Moves strdup function to utility file

@@ -0,0 +280,4 @@
+    // This has the notable side-effect that this function will return NULL if you attempt to look
+    // up a struct's internals starting from the node representing the struct itself. This is
+    // because an IdNode corresponds to the location *where an identifier is first declared.* Thus,
+    // an identifier has no knowledge of identifiers declared "inside" of it.

@@ -0,0 +287,4 @@
+
+    uint32_t idxLimit;
+    // If the current node forms an ordered scope then we want to prevent ourselves from looking
+    // up identifiers declared after the scope we have just come from.

@@ -0,0 +42,4 @@
+IdNode* LookdownId(IdNode *root, NodeType targetType, char *targetName);
+IdNode* LookupId(IdNode *node, IdNode *prev, char* target);
+
+//IdStatus CheckIds(Node *root);