xREL.v3

* Fixed random sounds mysteriously relocating/repitching sfx
* Emulate the ceiling glide glitch found in original game
* Replaced all sounds of the game with the N64 version of the game. Quality is actually significantly better than the original 1997 PC port
* Fix back/exit button on joystick menu
* Localization for hub key plaque messages
* Add a fatal error call preventing crash for missing vertex attribute array support common to Win 8.1-10 default WDDM drivers missing OpenGL 2.0 support
* Enemies can now be blown away while in the death state
* Use generic spark for metal (robot) grunt subtypes when hit by knife
* Green blood and non-blood support (toggled in violence options)
* Localize extra life string
* GPU memory optimizations and cleaner implementation of Bloom post process
* Fixed light scatter post process for intel chipsets
* Possible fix for multiple weapons showing at once
* Fixed memory leak and flooding of nested kexParsers due to level scripts not being properly closed
* Refactor cheats and add unlock of infinite lives when you get max lives
* Support for hud opacity cvar
* Do not allow picking up backpacks when you already have one
* More fixes for preventing player from getting ejected into a room below him
* Don't holster weapon when entering anti-gravity areas
* Possible fixes to Mantis script logic
* Fix a problem where campaigner will not stun if he is locked in a melee cycle
* Special case checks for dealing with looping sounds played by sources
* Warp hum and waterfall sounds now loop
* Allow birds and monkeys be killed by particle accelerator because why not?
* Make some wind sounds loop
* Fix minigun/accelerator loop sound lock when holdstering
* Fix particles randomly becoming black
* Fixing tek arrow models