[Bf-codereview] modeler normals don't match render normals (issue4280049)

[brechtvanlommel at gmail.com]

Looks ok to me, I've made some changes (but can't seem to attach the
patch here):
http://users.telenet.be/blendix/angle_weighted_vertex_normal.diff

This adds a version patch to recalculate normals on older files, and
also has some code style changes. Too late for me to commit today, can
do it tomorrow unless you find any more issues.

http://codereview.appspot.com/4280049/