Update firmware for Hardware 1.1.0

[lars-t-hansen]

At least the following are new:

• new pin for Mic / MEMS with sound sensing
• speaker output (speaker needs to do something, too)
• WAKE button is now labeled BTN1, fix documentation

[lars-t-hansen]

The speaker could be used as part of the "actuator" pipeline, see issue #22.

[lars-t-hansen]

Fixed.