.Primary/.Primary.Damage fixes

Errors occur with nil values in weapons such as the Stranded SWEPS or
DarkRP Stun Guns and shit. This just fixes it.
Murder Hack

[[Murder Wallhack/Tool/Hacker/Cheat/Machine/Dick]]

[X] Halo Around Murderer
[X] Text Above Murderer's head

[X] Halo Around people that have guns
[X] Text Above their heads

[X] Halo Around Loot
[X] Text Above Loot

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Used RenderScreenspaceEffects as I was getting better results from it, I
made it pretty quickly so if you see any quick improvements feel free to
do so.
Improved Murder Hack

Took some ideas from your ESP and fixed an error when the owner of the
Magnum comes up as Nil.
Merge pull request #17 from Deagler/master

.Primary/.Primary.Damage fixes and Murder Hack/Tool