BoundingVolumeBase.fromGeometry: prefill min/max values

When a SubGeometry has vertices with x, y or z values in a strict monotonically lower order, the maxX, maxY or maxZ (resp.) would not be set properly, but stay at negative infinity.
AxisAlignedBoundingBox: set aabbPointsDirty on transformFrom

When updateWorldBounds was called on an Entity, it computes the new bounds by calling worldBounds.transformFrom(bounds, sceneTransform), but the aabbPoints would not be updated.
Merge pull request #672 from nixn/master

coordinate handling fixes