Links between CFG and root CFG node added. I think we should remove links from the CFG to all basic blocks in favor of the node index. Same goes for links to all AST nodes from the AST.
Traversal for DDG implemented.
More work on DDG-code. The discovery of DDG links is now done, although not tested well. Now I just need to write the corresponding importer.
Refactored UseDefGraph code.
Finished DDG creation and import.