Re-adds missing texture check to UV mapping
Minimised if statement.
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
Reverted a incorrect edit. Export completes with normals, and texture
mapping. errant properties are still included in finished export. and
several values are not correctly set.
Selection of ungrouped vertices is updated to the 2.68a API. Error
message displays and vertices are selected in edit mode
Added check for specular property before setting specular color
Double scene root export bug is now dead.
Begun new method to determine mesh properties based on texture slots
Merge branch 'merge/bmesh_and_texture' of github.com:Ghostwalker71/blender_nif_plugin into merge/bmesh_and_texture
Minor fixes to material slot checks for duplicate values. Added extra
check so that only selected slots are processed. Also some further
progress to the method of determining mesh properties based on texture
slot settings.
Fix for UV layer detection. User is now notified if a UV map is not set
layer check now will check each processed layer for UV map
Merge branch 'merge/bmesh_and_texture' of github.com:Ghostwalker71/blender_nif_plugin into merge/bmesh_and_texture
Merge branch 'fix/uv_layer_detection' of github.com:Ghostwalker71/blender_nif_plugin into merge/bmesh_and_texture