keymap: Drop keyboard-keys-to-name.h We don't use that anywhere any more. With the introduction of alias names it also is not a proper mapping any more as several keys (e. g. KEY_COFFEE and KEY_SCREENLOCK) have the same numerical mapping.

build-sys: generate CLEANFILES from EXTRA_DIST Everything that is generated can be assumed to belong to CLEANFILES, which means that the original file has to be in EXTRA_DIST. Simplify the rules by generating as in $subject. We have less lists to adjust manually, and 'make clean' actually removes more stuff that before.

udev: add builtin 'keyboard' to manage key mappings

update .gitignore

move imported udev into place