* sysmocom_sja2: Implement EF_CHV files using construct
* test_files: Test decoder also with ff-padded input
* tests_files.py: Reduce code duplication
* Fix TLV_IE_Collection.from_tlv in certain situations
* ts_31_102: Implement decoders/encoders for EFs below DF.HNB
* support UCS-2 characters in EF.MMSUP, EF.ADN, EF.SPN, EF.PNN, EF.ECC
* Implement convoluted encoding of UCS-2 as per TS 102 221 Annex A
* 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