[Contra Costa] Rebase off latest TTTAttributedLabel

This required reimplementing the important parts of what we had before. I removed the kTTTBaseFontFromLabelAttributeName property and instead just always pass through to the label properties if they're not explicitly defined in the attributed text.

Because we force-pushed to the latest mattt/TTTAttributedLabel master, our old one is preserved at old-master-20130719

https://jira.corp.squareup.com/browse/REGISTER-7866

/cc @kyleve @pwesten