Reverted to default Valve sounds for the reloading and handling.

Meant to do this earlier.
- Slightly re-adjusted shaders to give the item a more metallic look
- HUD icon now included without needing secondary add-on

Last Stand update: recompiled to add individual reloading sounds to the Silenced SMG.

- Fixed more smoothing errors
- Reduced overbrightening in shaders
- Changed particle setup

- Fixed numerous smoothing errors I initially didn't notice
- Fixed the odd shell eject angle
- Tweaked the shaders/VMTs

Fixed smoothing errors on the silencer.