Police Barricade and corpse, hopefully fixed

Updated to the new workshop standards and gave the river_helicopter physics

-Added material for medkit for people that have it missing

Added ceda trailer (UNSTABLE)))

Added fixes to a couple more of props (quickpatch)

-Removed models for the flatnose trucks as they conflicted with CS:GO's own trucks. The shiny fix should still work for both trucks

-Disabled light on the C-130 as it was reported that it gets stuck on the map even after a clean-up

-Fixed inverted normal for police cars' lights

-Added Jukebox Complete, Saint Ligia II and Delivery Van

-Attempt #3 at fixing the Delivery Van

-Attempt #2 at fixing the Delivery Van