Fix time request and adding boost mode

1. Includes fix for the time request frame which could block all commands if the comfoair never responds to it
2. Added boost feature: this is an independent feature from the boost mode in the ComfoAir. Pressing the boost button set the fan speed to 3 for 20min. Pressing the boost button increases the current time by 20min. Any fan speed changed manuay interrupts the boost mode