Started on list.
* Changed "quiet" to "verbose" -> assuming quiet.
* Added tokenize_path from multi_root.
* Changed prune scheme to use a global variable set by -p or delroot.
* Fixed some bugs.
* Added checking for links to crawl_tree from multi_root.
* Incorporated create/drop_tmp_dir_table from multi_root.
* Implemented del_roots.
* Implemented a much simplier list_db.