Fix broken translucent grid material

Added sv_jump_precision_enable 0 to the cfg (thanks Valve)

- Slightly increased lighting brightness
- Renamed the stage end teleports to s(1-8)_end

Renamed zone triggers to sX_start (1 - 9) and map_end, as per the naming convention.[github.com]

Actually add the loading screen images (workshop packer being silly)

Added loading screen background.

Added post processing.

Created surf_kitsune.