- **[cleanup]** Much of the file tree builder has been moved to a new file in the voussoirkit, `pathtree.py`. The goal is to generalize the concept of a pathtree so I can start using it in other local-disk applications instead of having it locked into opendirdl's URL database. They were entangled very badly so it's still messy until I get the division of labor sorted out. Running the `tree` command on the commandline still works exactly the same as before.
- **[addition]** You can now call opendirdl using the database filename as the first argument, and the subcommand as the second. Previously, the subcommand always had to come first, but now they are interchangeable when the system detects that argv[0] is a file. This makes it much easier to do multiple operations on a single database because you can just backspace the previous command rather than having to hop over the database name to get to it.
- **[addition]** `measure` now takes an argument `--threads x` to use `x` threads during the head requests.
- **[addition]** New subcommand `list_urls` to just dump the urls.
- **[change]** Moved some nested function definitions out to the top level, and made the construction of the file tree its own function. These functions really don't need to be used on their own, but they were cluttering the logic of the `tree` command.
- **[change]** Renamed `Tree.listnodes` to `Tree.list_children`, and the `customsort` now expects to operate on Node objects rather than `(identifier, Node)` tuples. Nodes already have their identifier so the tuple was unecessary.
- **[change]** Replaced local `download_file` function with a call to `downloady.download_file`. It supports download continuation and removes duplicate work.
- **[cleanup]** Replaced all `safeprint` calls with `write` because it provides access to safeprint as well as file writing if needed.
- **[removal]** Removed `Tree.sorted_children` since it was basically a duplicate of `Tree.listnodes` and I don't know why I had both.
- **[addition]** Gave the HTML tree divs a very gentle shadow and alternating colors to help with depth perception.
- **[bugfix]** Fixed the allowed characters parameter of `filepath_sanitize`, which was not written correctly but worked out of luck.
- **[cleanup]** Rearranged the big blocks to be in a logical order rather than alphabetical order. Walker > Downloader > other classes
- **[cleanup]** Renamed the `keep_pattern` and `remove_pattern` functions to `keep_pattern_argparse` etc to be consistent with the other functions used by the argparser. *Does not affect the commandline usage!*
- **[cleanup]** Fixed some mismatched code vs comments
