Revision control
++ # The container is read back to front and both magic numbers are checked, so
++ # a dictionary is what gets past the header at all.
++ container_magic="\xd9\x7d\x20\x21"
++ mesh_magic="\x4d\x7f\xa0\xc8"
++ container_version="\x01\x00\x00\x00"
++ version_3="\x03\x00"
++ version_4="\x04\x00"
++ version_5="\x05\x00"
++ version_6="\x06\x00"
++ version_7="\x07\x00"
++ version_8="\x08\x00"
++ "attr_pos"
++ "attr_norm"
++ "attr_uv0"
++ "attr_uv1"
++ "attr_textan"
++ "attr_binormal"
++ "attr_joints"
++ "attr_weights"
++ "attr_colors"
++ "attr_tpos0"
++ "attr_tnorm0"
++ "attr_unsupported"