This is a kind of simplification/cleanup tool which joins adjacent faces and edges based on the angle. I've written this as an exercise (since I havnt written a bmesh operator before), and because quite a few users were asking for the dissolve operator to be extended, but I think this kind of functionality needs its own operator. access from specials menu and mesh menu. notes * this exposed a bug in angle_v3v3v3(). will merge fix into trunk after release. * added utility function BM_vert_edge_angle(), to get the angle between 2 connecting edges of a vert.