Kemptown rc4

* removed about 90% of the custom content, reducing this map's size from 10mb to 5mb

* made the fountain a bit narrower to give more room to the capture zone

* misc detail stuff

koth_kemptown_b4

* modified fountain to be lower and narrower

* fixed some dodgy clipping

* fixed some dodgy detailing

* replaced some ramps with stairs

* probably the last version before RC

* optimisation improvements

* artpass improvements

* I forgot what else I did

* actually packed custom content this time

* soundscapes!

* detailing improvements

* added more team colours

* clipping improvements

* maybe some other things too, I can't remember

* fixed misaligned lamp posts

* ???

koth_kemptown_b1

* actually decent-looking artpass!

* fewer windows

* put the lamppost props in after they mysteriously disappeared in a6 (???) (also removed the vans in front of spawn)

* changed routes out of spawn a wee bit

* replaced big-ass fences with little-ass barriers

* optimisation changes

a6a:

* fixed Red players being able to open Blue's spawn doors

koth_kemptown_a6

* added upstairs areas to the buildings separating mid from spawn

* continued artpass slightly

* windows

a5a:

* built cubemaps. whoops.