Fixed TreeSway causing graphical glitches with Flashlight
* The core issue was that value of `pShaderAPI->CurrentTime()` changed mid-frame, so some mesh would render with one time value, and then depthWrite shader would render the shadows for that mesh with a different timestamp, all within the same frame. Now we cache the time at frame start, fixing this and possibly other issues.
$basetexturetransform support for DepthWrite (alpha tested materials)
Prevent potential crashes on changelevel to do with color correction
Pull request: Minor loading screen cleanups
Disallow spawning SWEPs without models via spawnmenu
* Weapons like the built-in fists, that are just invisible when spawned in (middle mouse click)
Allow duplicating HL2 weapons from spawnmenu via duplicator as non admin
Speed up entry animations for the 3 PHX seats
* From 3 seconds to 1 second, like the other seats
Fixed 2D skybox not rendering in water reflections without 3d skybox
* When the water material specified "render 3D skybox", but map has no 3d skybox.