Modified macro definition for log output
add uvc_get_stream_ctrl_format_size_fps function
fixed some issues on uvc_get_focus_rel / uvc_set_focus_rel
add uvc_get_zoom_abs / uvc_set_zoom_abs / uvc_get_zoom_rel / uvc_set_zoom_rel
modified uvc_mjpeg2rgb
add uvc_mjpeg2yuyv
add thread priority increasing support on _uvc_handle_events
others