sept-s: turn on backlight after drawing image.

Fix copy/pasted copyright notice

sept-s: splash! (thanks @CtCaer, @balika011)

sept-s: redefine a while.

sept-s: fix building without keys (output won't work though)

sept-s: First functional version.

sept-s: Implement key derivation

sept-s: remove a bunch of debug garbage

sept-secondary: reboot to clean state + grab keys from SE

sept: implement cryptographic meme

sept: add secondary skeleton + buildscript

sept: commit working primary.