Renamed f -> poly as its cool
Updated code to generate vertex quad to use newer API to access normal,
co, vcol & uv data using loops. Fails to store the unique vert quad as
comparison logic needs updating.
Merge branch 'merge/bmesh_and_texture' of
git://github.com/neomonkeus/blender_nif_plugin.git into
merge/bmesh_and_texture

Conflicts:
	io_scene_nif/objectsys/object_export.py

Signed-off-by: Ghost <Ghostwalker_71@hotmail.com>
Added vertex_index to read the correct index value of the vertices for
the vertmap block