Update styles.less

Changed footer from 110px to 75px, and #wrap margin to match — the footer was too big for the amount of content in it (which meant the text was not vertically centred).
Update flatly.less

Because .item-summary is a p contained in an h4, it was using 1.1 line-height, which does not make for readability in large chunks of text. I applied the base line height to .item-summary.
Update userlist.js
Merge PR #217