Merge pull request #582 from Theodlz/brew-lsusb #458

Job	Run time
build-f3discovery-doc	1m 2s
build-book	21s
build-microbit-chapter (05-led-roulette)	31s
build-f3discovery-chapter (05-led-roulette)	27s
build-microbit-doc	2m 20s
build-microbit-chapter (07-uart)	33s
build-f3discovery-chapter (06-hello-world)	27s
build-microbit-chapter (08-i2c)	41s
build-f3discovery-chapter (07-registers)	34s
build-microbit-chapter (09-led-compass)	40s
build-f3discovery-chapter (08-leds-again)	22s
build-microbit-chapter (10-punch-o-meter)	45s
build-f3discovery-chapter (09-clocks-and-timers)	30s
build-f3discovery-chapter (11-usart)	26s
build-f3discovery-chapter (14-i2c)	21s
build-f3discovery-chapter (15-led-compass)	26s
build-f3discovery-chapter (16-punch-o-meter)	25s
	10m 51s

Provide feedback