Added ability to 'go again' instead of exiting. Useful if you have the program start automatically after a shell login. The readme includes instructions for getting it going on a Pi Zero with the light (no desktop) version of the Raspberry Pi OS, as well as how to have it auto-start after logging in.

Self-test fix. It would report a fail on the BIP-39 tests if the language was set to something other than English. This is because the test vector results are all in English.

Precompiled executables are not included in releases on purpose -- audit the code as you see fit. Compiling and running this software should be done on an air-gapped machine that is clean.