Swampcamp a3

* opened up mid a bit, having more entrances in to make it less campable
* opened up some other parts of the map too
* smoothed out some weird floor geometry
* moved the resupply locker in spawn
* more team colours
* downgraded ammopack in the huts flanking mid from medium to small
* shortened capture time from 12s to 9s
* fixed a game-breaking bug in which a wooden pallet was clipping into a barrel

* mid is a big larger

* mid hut is wider and hopefully less spammy

* removed the hole in the roof of the mid hut (mainly because I forgot to add it back in when I remade the hut)

* added a right-hand route to the point

* fixed players being able to get out of the map

* fixed an annoying sniper spot