Merge pull request #49 from hlindberg/master

Update ARM-8 Hiera2 with W.I.P
ARM-8 Typo and formatting corrections.

Not exhaustive, just what registered as I was reading through.

Made a few wording changes for clarity where I thought I understand the
intent.
Merge pull request #51 from jpartlow/arm-8-typos

ARM-8 Typo and formatting corrections.
ARM-8 add discussion tags/anchors