[Version 1.1]: Balance Updates

Mantle
- Reduced crafting cost from 50 leather to 35 leather
- Increased armor multiplier from 0.2 to 0.3
- Increased cold insulation multiplier from 0.5 to 0.6
- Increased crafting time from 1000 to 1200
- Removed torso coverage
- Added tribal faction prerequisite

Misc
- Added second layer to force mantle rendering over heavy bandolier
- Updated mod icon

Comments
In play testing I found the mantle's leather cost to be too steep to justify its role as an early-game option. By the time I had enough leather to craft it, I was often wearing something taken from a raider already. I also found the cold insulation to be underwhelming, even though it was cost-balanced against other outerwear. Ultimately I decided that the leather cost had to go down and the cold insulation had to go up to make it worthwhile. The purpose of the mantle was always intended to be warmth - not protection - so I removed torso coverage to emphasize this. Consequently, the mantle is outclassed by every other type of outerwear unlocked by complex clothing. This makes it feel balanced despite its low leather cost. In play testing now I'm finding myself really excited to craft a mantle whenever I get high-quality leathers like bearskin, whereas before I would just assume that it wasn't going to provide as much warmth as a duster or jacket. The mantle is really meant to be a sort of trophy piece, so this is exactly the vibe I was going for.

Seeing the mantle available as a crafting bill for industrial colonies felt wrong, so I've restricted it to tribal factions as part of this update. Industrial colonies start with complex clothing researched, so I don't think this actually matters all that much.

Removing torso protection means that mantles can now be worn with heavy bandoliers. Beyond looking cool, this helps to keep the heavy bandolier relevant in environments where they were never an option due to low temperatures.

[Version 0.1]: Initial Upload