Fix uninstall target in Makefile
Support swapping 'Alt' and 'Cmd' keys to emulate PC keyboard layout
Create .gitignore and update copyright info
Emulate PC keys (Print, Scroll Lock, Pause) also in virtual console
Migrate udev keymaps to hwdb data file

From systemd 206 changelog:
The udev "keymap" data files and tools to apply keyboard
specific mappings of scan to key codes, and force-release
scan code lists have been entirely replaced by a udev
"keyboard" builtin and a hwdb data file.