docstrings, untabify, don't shadow builtins, lowercase non-global
variable names, spaces after commas. Also bail if given any
arguments since we don't accept any.
+ * dak/init_db.py: likewise. Also split large main() into
+ subfunctions and rename get() to sql_get().
* dak/init_db.py (main): check returned value from
database.get_archive_id().