NiPacked nifs export.
Beginning conversion to poly/loops import method
Faces import as polygons, loops
Polygons, loops import with uvmap and textures applied. Merging vetices
during import is now supported.
Vertex colors import and support vertices merging.
Repositioned several dictionary variable so they reset as intended
during import and export.
Final cleanup for pull
Small edit to polygon import, combined mesh import now works, uvmap
import is next to be updated accordingly
Merge branch 'import/poly' of github.com:Ghostwalker71/blender_nif_plugin into update/test_framework
Corrected file path used for auto-nif generation.