Edited particles, added audio when ducks are hit

- Added a new flame texture for the shotgun particle spray. Texture
makes material look a little duller and more transparent.
- Edited shotgun spray particle so instead of it spraying 1000
particles it only releases 50, more efficent. Also changed the particle
spray rate a little and changed how the particle spits out, used to be
stretched billboard, now just billboard.
- Edited both water splash particles so that the spit out less
particles. Not 1000 any more. More efficent.
- Added two new audio clips, two duck sounds.
- Added duck call whenever duck is hit with bullet (death sound)