Past 72hr Jam Entry blackgold a7

Just a reupload of the "a6_packed" version after the site's blackout.

-done a bit of optimisation
-fixed a few misplacements
-packed the custom content

Last version for the 72h TF2 Jam I think.

-added rails on catwalks
-added info_observer_point
-added cubemaps
-detailed
-added 2 healthkits near the point

I'll pack textures and props from swamp and construction packs in the next version.

-Remade most of the point area
-Replaced house on cliff with a gas station
-Extended the warehouse on cliff to break a sightline
-Added some packs
-Added props
-Added signs
-rescaled dock house

-added tracks
-added a missing train on red side
-fixed the oil raising too high
-added a medium health kit next to the point
-increased spawn doors' speed (from 300 to 400)