Fix CdcUartTunnel, implement ESP32 boot sequences

Fix unsol. status generation, use one-pulse mode for UTS

Merge remote-tracking branch 'origin' into ultrasonic-measurement

WIP: Add ultrasound

Merge pull request #30 from RoboticsBrno/freertos_scheduler Start FreeRTOS scheduler

Merge pull request #29 from RoboticsBrno/debug_uart Implement DebugLink, some refactoring

Re-implement _exit to handle abort()

Start FreeRTOS scheduler

Use StreamBuffer and wait for empty space in DebugLink

Remove v1.1 BSP preparation