decrypt encrypted sav-files

[JanMarvin]

currently possible using pspp-convert

spss uses AES which could be provided by the openssl package?

file consists of 36 byte header followed by a aes 256 byte encoded sav-file

evaluate if it is possible. should be an interesting learning project on the other hand dependencies will increase (again) for an somewhat unimportant feature

[JanMarvin]

fixed in v0.5