improved logging and error messages

use Logger instead of messing with STDIO directly

Find card by a name pattern (regular expression) instead using hardcoded name. By default, we look for card with name matching the "Pioneer DJ.*" pattern and we expect exactly one card to be found. Custom pattern can be provided as a command-line argument. Whole name would look something like this: "Pioneer DJ Corporation DJM-250MK2 at usb-0000:01:00.0-10.1, high speed".