Blender Git Loki

Scripts:
- A few imported .ac models had wrong uv's, as reported by Melchior Franz (thanks). Well known reason: the vertex indices order in new faces is rearranged if the 3rd or 4th vindex is equal to 0, because of how Blender checks for tris/quads.

Fixing with that old trick of adding a vertex at index 0 in mesh.verts, adding 1 to each face vertex index, then removing the extra vertex after the model has been imported.