Fineprint text was variously styled with `.info`, `.tn`, `.hint`, or `.cost-footnote` css classes. Standardize on `.fineprint` instead. Use `.hint` only for form hints and `.tn` only for <tn> tags in translation notes. Incidentally changes the font size of form hints to 0.8em (was 0.7em) and the color of fineprint to #888 (was #AAA or #666).