Offer permalinks for titles in the handbook

For the handbook 2.0 rewrite, we want to make a better solution for deep linking to parts in the handbook pages. Parts are separated by the use of h html markup. The best solution I have seen to far was at transifex, see for instance: http://help.transifex.com/intro/one-dot-zero.html#major-changes Hover over the titles and you'll see the permalink pop up.