[Arm-netbook] Early UART output vs. housing board discovery

[Jonathan Neuschäfer]

On Wed, Jan 17, 2018 at 12:13:52PM +0000, Luke Kenneth Casson Leighton wrote:
> ok so i made a set of changes, replaced "I/O Board" with "Housing"
> everywhere, and updated the text as you suggest, jonathon.  no on the
> contraction though.  also added sentence (repeated) about UART
> level-shifting diagrams.

Thanks!