* sysmocom_sja2: Add some de/encode test vectors
* pySim-shell: Reject any non-decimal PIN values
* pySim-shell: permit string with spaces for 'echo' command
* pySim-shell: Validate that argument to 'apdu' command is proper hexstr
* pySim-shell: Improved argument validation for verify_adm argument
* Fix various mistakes around the CardADF <-> CardApplication dualism
* filesystem: fix various issues found by mypy
* filesystem: Avoid GPL header showing up in sphinx autodoc
* Use sphinx for generating documentation
* Add more documentation to the classes/methods