Various changes/Additions.

Update version to 1.6-D1 for development towards next release.
Import Ballistic knife animations from CoD black ops for use with the
"Assassins Blade".
Add kill icon for the Assassin's Blade.
Check whether a player is in third person or not in killcam, and reset
thirdperson on spawn.
Change Assassin's weapon from bulletweapon to projectile weapon for
possible implementation of ballistic knives.