- Fixed massive error when calling player:Alive()
- Added killcam Overlay to add some "atmosphere" to camera

- Fixed method, which lead to "jumping" camera everytime when used left mouse button and making "double-tap" from any weapon/swep
- Removed unused variables, making code more optimized

- Fixed error when player are killed by trigger_hurt or any other source that doesn't have certain class.
- If player gets killed by trigger_hurt or any other source like that, death message will display "Unknown".