Generalizing tree traversal function for pre-, in-, and post-order
Slightly cleaner region/offset setup for global/const
Implementing list_concat(a, b)

With unit test!
Refactoring of get_token() with addition of get_node()
Updating dependencies in Makefile
Better debug messages in main
Moving get_rule() and get_token() to node.h

Since they're extractors of node data.
Better jump statement names