- CACHED_CONTAINER::GetVertices: removed useless and unused function
which does nothing but tainted the API
- SHAPE_LINE_CHAIN::Collide( const BOX2I& aBox, int aClearance ):
removed an outdated function with assert(false)
- SHAPE::BBox(): fix a small typo in the doc string
- fixed walkaround bug causing unwanted overlap/clearance violation when the first segment of trace being laid intersects the obstacle's hull at the same point twice (ie. goes in, turns around and goes out).
- fixed placer bug not splitting the start segment after toggling via placement or changing trace width