Normalize type style classes

[seanwash]

For example, ts = type style, tt = type transform, tw = typeweight, etc

[chrsgrffth]

I didn't originally do this because the adjectives (at least the ones I can think of) can only describe type (ie .italic, .underline, .caps, .strikethrough) so tt- or ts- may not be necessary to denote a type class.

<a class="caps italic tn-1 tw-bold"> vs <a class="tt-caps ts-italic tn-1 tw-bold">

I think this one comes down to consistency vs aesthetics (or ease of scanning). What do you think @seanwash ?