- Added to Black Mesa workshop select screen.

Updated for Black Mesa 1.0. As part of this update, due to issues with
func_50cal, the gun on the final boss has been disabled.

- Restored music and soundscapes.
- Rescaled func_monitors.

- Workaround for edge case where airlock door is blocked by something
other than the blue box.
- Prevent players from passing barrels through utility room vent,
which can lead to them getting stuck.
- Alien Grunt can face the player during outro.
- Outdoors are now lit with -realskylight.

Fixed deprecated animations in scripted_sequences.

- Recompiled for Black Mesa April update.
- Reduced overall cubemap size.

Initial release.