CHIRP

Got a radio, working on it. Analyzed FT-4 driver, with some luck it will be a quick thing.

Built a cable, corrected some model specific parameters, can already download error-free.
It turned out that memory channels might be completely uninitialized on a new device (this model only?), so I had to shuffle a few things around to keep Chirp from complaining.

There are still plenty of things to polish. But we're getting there.

Can download and upload, radio works.
Still some issues with a failing Python test.

Seems all to work. Will test it some more.

Radio works, all tests are passing. I will prepare a set of patches this weekend.
A build should be available soon.

Applied in changeset commit:76834c065883.

WANTED:
Image of an FT-25E. If you have one, please send it to me!
The image can be downloaded using "FT-25R" as radio in Chirp. Once I have the image, I'll add the FT-25E to Chirp.