Ammo and Health

• Added Health and Shields variables to the player
• Added Ammo , Health and Shields to the HUD
• Added damage to the projectiles, and the first damage type: Energy.  Energy damage depletes shields before taking away health.
• Added Death and Respawn. Made some placeholder death effects to work with later.  Dying puts the player in ragdoll with a third person camera.  Press the "Use" key to respawn.

All of it works in multiplayer.