Comicbox

- Fix

- Fix dest-path cli argument.
- Use defusedxml for XML parsing.
- Fix recursion crash.
- Log exception during recursion and proceed.

- Fix

- Remove uneccissary dependencies

- Fix

- Fix filename extension parsing
- Renamed underscore cli options to use dash instead
- Fixed crash when recompressing directories.

- Features

- ComicArchive class now has a context manager
- Removed as_pil() methods for pages and covers

- Features

- Methods for getting covers and pages as PIL Images.
- Lazy metadata and cover pulling. Removes `metadata` and `cover` options.
- closefd option leaves archive open after method calls. Close manually with
close().
- .cbt Tarfile comic archive support.

- Features

- Issues numbers are now strings.
- Separate read metadata option from print metadata action.
- Added dry_run option.
- Namespace config under "comicbox" map to allow inclusion in caller configs.
- Allow modnames for local config sources, useful when comicbox is a library.

- Fixes
- Trap errors reading user config files.
- Fixed cover extraction to a directory.
- Abort with message if pages asked to extracted to a filee.
- Handle more filename patterns.