kunzjacq

Qt6 port, warning suppression

1

In addition to changes required to port to Qt6, warnings related to boost bind and to deprecated types in Tiff{Reader,Writer}.hpp were eliminated.

teensy3/usb_keyboard: led hook, added output functions

1

- added a function pointer to store a callback function called when a led state change is requested. callback is set with function `usb_keyboard_set_led_callback`. - added functions to send oem...