Spring RTS Engine

See https://github.com/sanguinariojoe/blend ... 5ecd4dd1a3

It is actually a bug in upspring, but since many models were already built with upspring, fixing the bug now would not help much, so we are patching the blender importer instead. Anyway, is the upspring project alive to report the problem?

Beherith nailed that, upspring is duplicating vertices because the UV information. However, in Blender UVs are face information, so I just added a new patch to fix that situation:

https://github.com/sanguinariojoe/blend ... 888d3a2722

Lovely! Now we can export wreck models from the end of a death animation in blender! :D

Thank you <3