v.0.12.3 Portraits and new main menu screen

- New main menu. A bit grim dark, but I hope you'll like it.

- Now, a portrait of the speaker is displayed in all dialogues. This was long overdue.

- Dead fire missiles now correctly disable the maximum range bracket for SRMs, not just for LRMs

- Something interesting to test for the Patrons, but it's not yet good enough for public release.

- A dozen small adjustments under the hood.

There is also a build for Android. I don't know what's in it Everything was compiled without errors, but I don't have a way to check it right now. I assume everything should work, but I can't guarantee anything about performance or whether the text or buttons are too small. This is an experiment; it does not mean that I will support the mobile version.