Changes

* usable layout regression tests (I think roc's mostly done here)* events** Currently [[Gecko:Event Dispatching Coordinates]] are screwed up. Fixing it is a big task but not hard in principle.** widget vs. DOM event duplication* plugins* printing** UI / preview (its own window)!** overly-complicated glue code** gfx + OS side (hopefully mostly fixed up with cairo landing)** layout stuff (page-breaking improvements, code simplification)* layout** form controls** frame construction*** XBL2 issues** reflow*** Work is ongoing on [[Gecko:Reflow Refactoring]], i.e., changing the way we handle intrinsic width calculation and incremental layout.*** further cleanup of nsHTMLReflowState following* gfx* SVG* content** image loading (dbaron's complaints)* imglib** bz's issues* editor** caret** contentEditable* focus* docshell* selection** rename classes (dbaron)* range* de-optimize data, shrink code** O(N^2) data structures* PresShell / PresContext unification** unify lifetimes first