* Moved code that resolves targets into roots,subtree/file from list_db into separate function.
* Debugged list_db and is working.
* Changed process_root() to scan_target().
* Updated scan_target() to use resolve_target() to resolve starting directory info.
* Fixed a bug with root vs. rootdir.
Merge branch 'dev' of https://github.com/jsbackus/simple_file_integrity_tool into dev
Added progress capability to checkdb.
* Started converting tuples-based stats to dict-based stats.
* Marked a couple of functions to consider removing.