remove use of ob.update_from_editmode() since editmode meshes don't get access to customdata layers. 

solution from Philipp Oeser

make addons blender versions consistent

un-modified, my own change didnt match up with the x3d spec.

by Michalis Kamburelis (kambi)

Normalize the axis before writing to avoid small values writing as a zero'd axis.

patch by Alan Hudson

apply part of the patch included with the report - by Alan Hudson.

finished

update addons enabled by default to use 'faces -> tessfaces' also grease pencil scatter and quake map export.

from Michalis Kamburelis (kambi)