Nothing like being on vacation when you actually need to make progress with something. In the last couple of days I've added all the document display functionality, added more sophisticated handling for centring features and sets of features, updated a lot of the documentation, refactored much of the code to move var declaration to the top of functions (not complete yet), fixed a bug in the search, made the colour sets user-settable, and made numerous tweaks to display and rendering functionality. There's one remaining bug in webkit with the white outline for the navigation panel selected item, but apart from that, I don't think there's much. Now I need to start working on the mobile display, I think.