Added the functionality of setting the keyboard in the configuration file.
Moved the function to_scancodes() to the module keyboard.
Changed the name of the main folder to pykeywatcher and implemented the loading of key sequences.
Moved the functions of conversion of keycodes to a separate module "utils", to break a circular dependency between the modules "keyboard" and "keywatcher".
Added a check of errors in the conversion to keycodes.
Fixed the script echo_keys() and deleted the useless function watch_keys().