Basic Sounds Implemented. Reload fixed.

A lot of AudioSources, so the objects look at bit messy with all the
audio sources inside. Tried to fix it by using AudioClips, but nothing
seemed to work, so I'm leaving it at this for now.

Zombie death sound added in. Weapon sounds added. Zed himself does not
have any sounds attached to him, though.

Oh yeah, reload is fixed.