Introduce a script to convert old dumps into evemu file format 1.1

Evemu file format 1.1 adds human readable description to the dumps,
making them easily readable. This script converts the old dumps into
the new file format.

The conversion is done in two steps:
- use the python evemu API to retrieve the description by creating and
  reading back the device
- parse and output the events not using evemu play/record due to the
  kernel modifying events for devices having fuzz.

NOTE: device presenting resolution will get it stripped by the script

Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>

Squashed with: Use argparse for output control

Bit overkill for a single argument but more flexible in the future.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>