Similar in style to evemu-play but parses the YAML printed by
libinput-record. Note that this tool requires python-libevdev which is a new
package and may not be packaged by your distribution. Install with pip3 or
alternatively, just ignore libinput-replay, it's a developer tool only anyway.

User-visible differences to evemu-play:
* supports replaying multiple devices at the same time.
* no replaying on a specific device, we can add this if we ever need it
* --verbose prints the event to stdout as we are replaying them. This is
  particularly useful on long recordings - once the bug occurs we can ctrl+c
  and match up the last few lines with the recordings file. This allows us to
  e.g. drop the rest of the file.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>