Squashed 'shared/' changes from 4774989..a7a34ac

a7a34ac IE fix
c9b7c75 IE fix
c359d00 add back typography.scss (not sure where it went, to be honest)
049f9f3 fonts, styles and shims for IE

git-subtree-dir: shared
git-subtree-split: a7a34ac43a70e90d215547cb765d197756d5954a
Merge commit '81982b2a610856c986f0077e4e8337cb05046a9c'
IE fixes