Encrypted SDcard setup
We don't have a non-commandline story here. To me it looks like it warrants a special app since
- maybe add a backup option / warn about data loss
- add encryption
- allow the user e.g. to move /home over or /home// (Music/, Downloads/, ...)
- setup crypttab etc for automatic mounting (that doesn't halt the boot if sdcard is missing)
/cc @francois.techene since i guess this is a commonly needed thing.