Tweaked the default engine RPM values to make them behave in a more realistic way, as well as changing a few other values to make them work best with these new defaults.

Check out the pull request page[github.com] to see more details.

- Replaced Police Cruiser horn with a proper "buzzing" sound
- Added a option for developers to set a alternate siren wail sound when pressing the horn button while sirens are active
- Added console variable: glide_world_physics_damage_multiplier

- No need to call StopMotionController on missiles (Thanks, Astralcircle!)
- Added a way to override surface grip/surface rolling resistance on a per vehicle basis
- Slighty tweaked surface grip logic

- Added console variable to disable explosive bullets on Turrets: glide_turret_explosive_allow (Thanks, Astralcircle!)
- Don't light up brakes if engine/headlights are off
- Offset the third person camera when a trailer is attached
- Tweaked volume for many engine sounds
- Implemented some functions from the Vehicle metatable
- Added ENT options for camera offset while a trailer is attached: ENT.CameraTrailerOffset and ENT.CameraTrailerDistanceMultiplier

- Added option to disable custom vehicle/player health display (Thanks, Astralcircle!)
- Added proper truck shutdown sound
- Replaced the IsBraking network variable (boolean value) with BrakeValue (number value)

- Added config. tab to edit most of Glide's console variables
- Added console variable to enable/disable ragdolling: glide_ragdoll_enable (Thanks, Astralcircle!)
- Made tool-related entities and vehicles use the "cleanup" system (You can cleanup only Glide vehicles or only Turrets for example)
- Console variables related to entity limits are now visible on the spawn menu (Utilities > Admin > Sandbox Settings)

- Added Wiremod IO for sirens
- Added ifBodygroupId and ifSubModelId options to ENT.SirenLights
- Applied a not-so-great way of making wheels ignore entities with "disabled collisions"

- Added ifBodygroupId and ifSubModelId options to ENT.ExhaustOffsets, ENT.LightSprites and ENT.Headlights

This should allow vehicle creators to only show certain lights/sprites/exhaust particles depending on bodygroup submodels

- Fix explosive bullets passing through NPCs
- Fix wheels ignoring some movable map brushes
- Update theme library to use extended fonts (Thanks, Flarky55!)
- Changed Russian localization (Thanks, Flarky55!)

- Removed the ManipulateBone* level transition fix, it's no longer needed (Shoutout to Rubat)
- Tweaked physics collision logic