Tweak gaussian blur a bit more
Remove old gaussian blur filters
Rework "comic book" as "film noir"

In preparation for a new, much awesome comic book effect
New "Smart Blur" tool

Works a bit like selective gaussian blur in GIMP, but with a few extra
modifications.  It's not quite as harsh as GIMP's function (I've
deliberately toned it down), and I've also added the ability to
selectively blur either edges or non-edges.