A number of things to fix. Need a new import of the [dtd](https://github.com/unicode-org/cldr/blob/67bcf4eef09a732306c54cf71bfd9111463348aa/keyboards/dtd/ldmlKeyboard.dtd)? * `<backspace>` is no longer in the draft, replaced by `<transform type="backspace">` * BkspCompiler should become more like the FinlCompiler * TODO: enumerate other changes here...
