Blender Git Loki

Added ability to copy clnors.

Also contains commented code for averaging, I'll finish it after weighting modes. No hotkeys for copy (yet). You can copy either face normals or single loop normals.
Here single loop normal means: selecting a vert then a face of the vert will copy loop normal of the face associated with this vert. So, standard vert ->click-> copy wont work.

click on vert then copy will work if a) Loops of vert are merged b) Loops of vert have same normal value.
Pasting works with the same standard selection rules