[Autocrypt] Multi-platform Autocrypt-Setup-Message in action (just an image)

[Björn Petersen]

Hi Autocrypters,

beside all the theoretical background, here's a nice (?) image showing
the key transfer between Delta Chat and Enigmail:

https://delta.chat/assets/blog/20171215-asm-delta-enigmail.jpg

The transfer works from Delta Chat 0.10.x to Enigmail Nighties. The
transfer is also possible from Enigmail to Enigmail but not yet from
Enigmail to Delta (there are some functions left to fill :)

Things really start working :)

Best regards -
Björn