added some more details (an outlook that isn't used) and hopefully balanced the 6th trench

added details

More testing for balancing on trench 4 (a ton of stuff makes it stalemate on that point)

rebalanced trench 4 and added more rocks and wire

added trees, barbed wire, rocks, and just a ton of details

added some sandbags and turrets to trench 0

plane for defenders, and some terrain repainting

Metadata fix