Updated the export script to make use of the new SplitNifTree function to write XNif and XKf files.
Updated the export script to make use of the new SplitNifTree function to write XNif and XKf files.

nightstrike/blender_nif_plugin,amorilia/blender_nif_plugin,amorilia/blender_nif_plugin,nightstrike/blender_nif_plugin